The git CLI is a mess. It's inconsistent even within its own commands. For example, sometimes specifying remote and branch is done as "remote/branch" and sometimes as "remote branch".

It even uses different words for the same thing - sometimes remove, sometimes rm sometimes -d.

Common actions often require obscure command lines, like "make a new branch" which is git checkout -b instead of just "git branch".

The reason people don't use other git frontends is that a vast majority of the help topics already out there only reference git itself. So if you want help for rebase, for example, if you're using some frontend that re-kajiggers the command line, all that help is now useless, or even worse, potentially downright incorrect.