The fighters are getting injuried more because 1, they all trying to cut weight at ridiculous weight to get bigger mix matches. We use to have a Royce gracie fighting guys 100lbs bigger than him. Imagine Rumble Johnson is fighting at 205 now he use to cut weight down to 170, miss weight or barely make weight and just lay and pray cous he too dehydrated to go hard for 3 rounds.
Another thing, really think about it how many injuries have actually happened in the ring as compared to in training. Maybe they should stop these marathon training sessions and just fight in their proper weight class instead.