Virtually no one knows how to do anything with it outside of github.
You might be surprised, but that's not true at all.
I once read someone commenting "Nobody writes code by hand without looking syntax up".
Man, you are just outing yourself as a complete beginner, the field is way deeper than you imagine and it's not even close.
That's a them problem.
i still find insightful ways to use git every day. amazing tool. it's a shame for those who only see it as "how to sync my repo with my coworkers"
Your favorite search engine or LLM will show you in a second, it's really easy.
The problem is that it's not enough. The fact that Github uses Git specifically is a technical detail; it could use mercurial equally easily, as Bitbucket used to. Github Actions, OWNERS files, PRs and review tools, issue tracker, wiki are all not Git features.