Those are all completely irrelevant, and I won't get into them. You're sliding off onto tangents.
It's a touch of cruelty to watch two boxers beat the shit out of each other, which is likely why this sport should be considered the one the audience should be moving on from.
That's what you said. And I countered with this:
The only difference I observe from boxing is that it's two barbarians trying to kill each other on the ground, vs standing up.
Case closed, friend! I think my point was quite clear. If you're trying to convince me that cage-fighting has any virtue besides feeding the gambling industry, then bring some verifiable facts to the conversation. Your pontificating on the inherent dangers of life in general says nothing about cage-fighting being unnecessarily violent and barbaric.
This entire class of entertainment can be considered unnecessarily violent and barbaric by those who wish to view it that way. You clearly do, and yet I promise you that I could point to most of not all "sports" in existence today and call them utterly pointless in every way other than to feed rampant capitalism, putting a fine point on all sports-related injuries and deaths. And gamblers would place bets on the color of dog shit. Gamblers be gamblers, they don't even need a good sport to find an excuse to gamble, so let's just drop that argument.
My point here is I tend to see varying levels of acceptance within the class of "violent" sports, based on verifiable facts that show what is the safer style. I see the sport of boxing as unnecessarily violent based on statistics. I see MMA as more an extension of wrestling with far more winning strategies lending to technique than sheer knock-outs. Those who train for nothing but power shots in that sport do not last long, for they are usually submitted nonviolently and beaten repeatedly by technique, which many find the technique aspect of the sport entertaining. Makes sense when you're watching the best in the world in professional sports to respect the skill that put them there.
In my opinion, you've smeared over a large class of "violent" sports with a rather blind stance without knowing and understanding the difference, as demonstrated by statistics.
Leaders used to force gladiators into the ring to fight to an arranged death, in front of tens of thousands of screaming fans demanding it. If you look at history, we've actually matured quite a bit as fans, for that is what we used to call a true blood sport.