Yes, really. You just proved the other poster’s point. He says “a lot of developers have not learned git IN DEPTH” and you respond by saying that’s not true because you’ve gotten away with just using a small subset.

Git is quite powerful, but the cli is a train wreck of complexity and inconsistency. Learning the options to one git command means you’ve learned the options to exactly one git command. No other git command is required to use the same terminology. Personally, I was stuck in “git basics land” (all the basic commands you list) until I adopted Magit in Emacs. IMO, the Magit team deserves a medal for making git usable at an advanced level.

I don’t have an opinion about jj yet, but no one can hold up git as a pinnacle of great source control. Yes, it’s powerful, but it’s a UI train wreck.