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.
Not really. I've been around a while. Git for about 15 years. Subversion before that. Perforce before that. rcs before that (back down to sun3 machines). Mostly Fossil now for personal things.
What I am saying is that people learn as much as they need to. They generally don't need to know any more git than is required to interact with github. If anything problematic comes up, they go in with a wrecking ball because they don't truly understand what they are doing. And git has a lot of wrecking balls available.
If you threw them at raw git and asked them to collaborate with someone they'd be up shit creek. They have no idea how SSH or email works for example.