Nonsense. Fixing a typo or amending a command somewhere in the middle are obvious use cases.
The kind of person that would use it doesn’t use a terminal.
Then I wasn't clear, I am talking about using the mouse to position the cursor in the current line being edited. If I am writing a long command and realize I made a typo 50 characters earlier in the second argument, I should be able to click in the second argument to reposition my cursor. And yes, I do use vi-mode and know how to do this the vi-way with just the keyboard, but Vim also supports using the mouse for this and there's no reason shells shouldn't as well.
> The kind of person that would use it doesn’t use a terminal.
Absolute nonsense.
You're the only person to implement this slower/problematic/nifty design in five decades, on a FLOSS operating system. Just a guess but maybe your attitude is also part of the problem.