> Why learn how to use git with Emacs/magit, vim, IntelliJ IDEA, Eclipse, Visual Studio / Code, ... when you can just master the official command line client and forget about the rest?

Because there are plenty of operations which are way less convenient through the CLI e.g. selecting rebase ranges, reviewing branches, interactively staging and unstaging, etc… are infinitely more convenient via magit. And git blame on the CLI is so full of drudgery it’s basically useless while intellij’s lets me drill through history extremely quickly and easily.

The CLI requires juggling terminals and / or keeping a bunch of crap in your head or clipboard which richer clients simply do for you.