Control-c meant cancel for decades before some idiot decided that it ought to mean copy instead.

As for your pinky, just type the chords correctly and you won’t hurt yourself. This means typing the modifier key(s) with the opposite hand instead of the same hand that is typing the letter. So for control-z you are going to type the “z” with your left hand, so use your right hand to type “control”. That’s why the keyboard has every modifier key on both sides.