you know there are levels of caring. do people *care* like they would if it were a family member? no, obviously not.
do I care enough that i'm happy those hits are gone from the game, as opposed to having that extra aspect within the game making it slightly more entertaining? yes, I care that much, and am happy fewer players will take a gun to their temple at age 50.
as for ufc fighters, it seems that they typically actually suffer far fewer blows to the head than say footballers, hockey players, or boxers, and so it appears as if they are at a much lower risk for this condition. a longer history of records will be needed however, and if results begin to show high levels of trauma, then precautions should be put in place.
it isn't about: i dont care, it's sports, they make money.
it's about: ok, there is inherent risk involved in this sport, but we allow it for a host of reasons. now let's work to minimize those risks so that we can continue to enjoy the sport and not be totally shitty people.