Because this is a casual discussion and that’d be more effort than I’m willing to put in. Also, your premise is false: it can both be trivial NON-trivial to implement something better and relatively obvious that a better implementation could exist.
Also, if you’ve encountered these sorts of discussions before, I’d dare say it’s because people often avoid flame wars and you give off flame war energy.
I’ve mentioned two pretty concrete examples: be like mercurial and have a built in GUI. The basic commands being janky is also pretty concrete given the recent additions that have been made to correct that. But I don’t trust that you want a discussion because you’re being pretty demanding and aggressive here. Sea lioning would be somewhat apt … there is such a thing as meeting people where they are … do you have an example of something people often criticise about git that you don’t think can be improved or not easily? “Why is it so hard for replies to actually have a discussion rather than be demanding, argumentative and aggressive”