Unless they are silent injuries that build up over time like concussions or head injuries.
I think this, combined with the fact that kickoffs rarely impact the game, that changes to it are the easiest and less intrusive. Sure there's other plays that are dangerous, but if you, for instance, play two hand touch on all QB's, thats severely altering the game. Giving a team the option to always at least have the ball at the 25 doesn't really change much, but makes it look like they are trying to limit injuries on a play that appears very dangerous.