Typing eza is a pretty horrible three character combination on a qwerty keyboard. One advantage of ls is it’s a lightning fast set of key strokes. I guess you can alias, but that’s kind of weird (compatibility, etc).
You can alias it to whatever you want though.
I'm not sure the meaning behind the name, but maybe they should have picked `eya` instead, that's nice and satisfying rather than the double pinky move :D