I got my books from libgen primarily.
But I have a curated list. Just because someone has access to libgen doesn't mean they'll know what is available to them or how to look for it.
I have videos and other materials too. I've failed to build a community. So I'm willing to take the greater amount of risk inherit in sharing knowledge online in order to make use of what I've got.
Perhaps this is a sunk cost fallcy on my part.