Typically because you have been leaning on the GUI for ages and don't know the CLI well enough to do the easy stuff quickly let alone the advanced stuff at all. Or are even aware of what you can do with the CLI. And if you do know the CLI well enough you tend to find it just faster to work with and easier to automate things.

Interactive rebase? There's no GUI that actually does that well, if at all. And it's a massive part of my daily workflow.

The CLI is far, far more powerful and has many features that GUIs do not.

It's also scriptable. For example, I often like to see just the commits I've made that diverge from master, along with the files changed in each. This can be accomplished with git log --oneline --stat --name-status origin/master..HEAD. What's more, since this is just a CLI command, I can very easily make a keybind in vim to execute the command and stick it's output into a split window. This lets me use git as a navigation tool as I can then very quickly jump to files that I've changed in some recent commit.

This is all using a standard, uniform interface without mucking around with IDE plugin settings (if they even can do such a thing). I have many, many other examples of scripting with it, such as loading side-by-side diffs for all files in the worktree against some particular commit (defaulting to master) in vim in a tabpage-per-file, which I often use to review all of my changes before making a commit.

Click to view diffs is super ergonomic; on the other hand, I actually have a story about the Git CLI trumping the GUI (spoiler: reflog).

In high school we had gotten the funding to build a robot, and one of the adults in charge -- guy was brilliant -- was using GitHub Desktop to conduct a feature merge with the student who served as team lead. The thing was, he was used to older codebases, so all of his experience was with CVS instead of Git -- so when the two slightly messed up the git merge, they discussed recloning everything instead of wasting time plumbing the error (relevant xkcd).

That was one of the earliest times I had the cajones to walk up to a superior and say "No, you're doing this totally wrong. You don't have to do that."

He looked at me and nodded. "What would you do instead?"

"Reflog."

"Reflog? I've never heard of it before. Can you show us?"

I hopped onto the laptop and clicked around GitHub Desktop, but couldn't manage to find any buttons related to reflog... so I went straight to cmd.exe instead.

git reflog
git reset --hard "HEAD@{7}"

"Done. We can continue rebasing."

And after that, the advisor complimented me for using the command line tool!

"Lots of GUI apps are just limited frontends to the real meat and potatoes, the command line. Nice job!"

I felt like a wizard! And so I became the team's Git-inator.

edit: pruned story

I see nothing in this graphic that isn’t easy to do with a gui.

I didnt say the GUI was not easy for the common stuff. But I think the CLI is also easy for the common stuff so there is not much advantage other than a bit of a learning curve with the CLI. But the big thing that GUIs make harder is automation of common things. For instance, when I want to create a PR I like to rebase to the latest upstream. In a GUI that is a bunch of button clicks. With the cli I just <CTRL+R>pus and that will autocomplete to git pull --rebase=interactive --autostash && git push && gh pr create --web and I am landed in a web browser ready to review and submit my PR. Doing the same thing in a GUI takes a lot longer with a lot more clicking.

And that is a very common command for me.

Like logging and diffing is just so much easier when I can just scroll and click as opposed to having to do a log command, scroll, then remember the hashes, and then write the command.

Never found that to be a big issue. Most of the time when you want a diff you want to diff local changes or staged changes which is simply git diff and git diff --staged neither of those are hard or any real easier in the GUI (especially with bash history). For diffing specific commits I dont find that hard either just git log --oneline and find the commits (and you can use grep to filter things out easily as well here) - typically does not require scrolling at all. Then git diff <copy paste>..<copy paste>. In the GUIs you are often scrolling through commits you want to select at some point so I dont see how that saves you any real time here. I would not say the CLI or GUI is vastly easier in this case. And even in this case it is rare to need to do. Far more often is just branches which on a decent shell can be tab completed for convenience.

And sometimes I watch beginners use the gui and I have to bite my tongue because I know it would be faster in the cli.

This is why I prefer the CLI for common stuff. It is just faster.

But, especially for a beginner, i strongly recommend a gui.

And that is where I disagree. I think beginners should spend some time learning the tools they will need to use. IMO the CLI is critical for developers to learn and the sooner the better. So many things a vastly easier with the CLI than GUIs and a lot of stuff is near impossible with GUIs. Automation being a big one. I have not seen a good CI system that is GUI focused that you never need to know the cli for. Or when you have a repetitive task then it is quicker to write a quick script and run that then doing the same thing over and over in the GUI. Repeating actions is also easier in the CLI. All of these apply to more than just git as well.

I have seen so many beginners start with GUIs that don't really understand what they are doing in git. And quite often break things and then just delete and recreate the repo and manually make their changes again. I find people that never bother with the CLI always hit a ceiling quite quickly in terms of their ability and productivity.

The only real thing that makes the CLI worst is that it has a steeper learning curve. Once you are over that hill I find it to be vastly better for more situations or at least not practically any worst than a GUI equivalent. So that hill is one well worth climbing.

I can always use a GUI if I really needed to. But those that only know the GUI will have a very hard time on the CLI when they need to - which is required far more often than the other way round.