I think that's a huge symptom of my point. You can strip out tackles from football and make MMA way safer, but the large MMA competitions are popular because they're closer to two people doing whatever they can to win a fight than something more restrictive, like karate or wrestling. As you mention, the fans will be pissed at safening the sport, and I'd almost bet money that the vast majority of the fighters would be pissed as well -- just like I've seen plenty of coworkers and workers in other industries get angry at OSHA regulations, even the ones that are as ridiculously straightforward as labeling the bottle of formaldehyde so someone doesn't spritz it around a clinic.