[Retozi]

One might argue that MMA crosses the line in terms of acceptable injury, but it would be quite unfair to single the sport out as "the sport that crosses the line".

Boxing, Kickboxing and Football are arguably as bad as MMA in regards to brain damage, and many other sports in regards to chronic pain of some sort.

Calling MMA out specifically on this issue is a convolution of the perceived violence and the degree of injury. (I don't care if fighters bathe in each other's blood, as long as the blood stems from a cut)

The problem is that protecting the fighters is not simply a matter of adding Headgear (you can get knocked out easily with headgear as well btw) in fights, as a lot of fighters accrue their injuries in training.

If it would be only the fight that could cause harm, I would argue MMA would be safe. But the lifestyle of a fighter as a whole is extremely unhealthy.