It can be nice when you successfully do a rebase (after resolving conflicts), but change your mind about the resolution and want to redo it.
Doesn't come up that much, but it's been handy once or twice, for me. It's also just nice security: no matter how I edit commits, I can always go back if I need to.
Interactive rebase? There's no GUI that actually does that well, if at all. And it's a massive part of my daily workflow.
The CLI is far, far more powerful and has many features that GUIs do not.
It's also scriptable. For example, I often like to see just the commits I've made that diverge from master, along with the files changed in each. This can be accomplished with
git log --oneline --stat --name-status origin/master..HEAD
. What's more, since this is just a CLI command, I can very easily make a keybind in vim to execute the command and stick it's output into a split window. This lets me use git as a navigation tool as I can then very quickly jump to files that I've changed in some recent commit.This is all using a standard, uniform interface without mucking around with IDE plugin settings (if they even can do such a thing). I have many, many other examples of scripting with it, such as loading side-by-side diffs for all files in the worktree against some particular commit (defaulting to master) in vim in a tabpage-per-file, which I often use to review all of my changes before making a commit.