I would like to add another element which is that of rules...
pre 1743 and the Jack Broughton rules, boxing, or bare knuckle prize fighting, consisted of grappling techniques, throws, arm locks, chokes and kicks and included rules like continuing until one man could no longer carry on (there were also quarterstaff and short sword rounds as well interestingly enough, together with their eerily similar man sau stance).... anyway Jack Broughton due to killing a man, brought in safety rules and gloves and then the Marquess of Queensbury Rules came in, in 1867 making boxing even safer and more sport-man like.
Boxing now has huge developments in scientific advances in training and understanding, but would a champion bare knuckle prize fighter win against a champion contemporary boxer in a street fight, in my view I think they probably would, but I think the bare knuckle boxer would probably lose in a boxing match with gloves on if forced to abide to the contemporary rules. (please no-one mention the Mcgregor-Mayweather match, as I am still disappointed I paid to watch that).
So there is an element of framing going on.... I am not peddaling out the old "wing chun is too deadly to ever work in a competitive environment" but I am saying that advances are sometimes only good for turning a fighting system into a sport and increasing that sports entertainment value and safety. I may be wrong but I think something similar may have resulted in the emergence of Judo from Jujutsu.
Anyways...So in the UK fights are common on most Saturday nights, maybe its because no-one has guns, I don't know... anyway things you regularly see in a standard drunken fight are things which are directly listed as fouls in MMA rules:
- Biting or spitting at an opponent
- Downward pointing of elbow strikes
- Clawing, pinching, twisting the flesh
- Kicking the head of a grounded opponent etc.etc.
From the MMA schools I have seen, they don't train for this in their sparring, maybe cause its against the rules, again I don't know. But what I do know is that these rules are not making MMA better more efficient and more effective, they are turning it more into a sport. If more rules come in, MMA will become more of a sport, safer and more entertaining. Which is fine, but when I read stuff about MMA leading to being the ultimate fighter or ultimate fighting technique...
I think you would need to strip all the rules out to get there.