That's what I don't get about these arguments in support of text editing on iOS. The mouse isn't bound to the physical dimensions of the screen. It also doesn't require you to put it atop/obscure the screen to work, either (unless you're doing something very wrong).

I'm sure there are zippy ways to edit text on iOS, but like you, after using a mouse, hell, even a trackpad, I think it's soooo much quicker using the latter.