Its literally why I said we need to define what a running QB is, which you now have. I agree with your definition, but wanted to know what you meant originally. I didn't move the goal posts, I just wanted to define where they were, and offered a spectrum of options.
I agree that a run-first QB carries a perceived enhanced risk of injury.
I disagree that a mobile QB carries the same perceived risk of injury.
I think statistically they've shown that there is equal risk due to the random nature of how collisions happen in football. Even pocket passers get injured pretty often, and guys like Collin Klein can go game after game, and keep playing.