I agree with you, but I also have the thought of "well, git is one of the _top_ tools of the 500 I use," so I think I'm a bit more inclined to fill in a few more gaps as I encounter them. Ultimately though if you have the right balance of knowledge about the tool, you can always stop learning more about it until you learn otherwise…
Also true, and I agree. As mentioned in a sibling comment, with time I kind of started loathing the idea of learning GIT's internals so here we are. We'll see, these things tend to fall away with time.