The effective techniques in MMA are just as defined by the ground rules as any other martial art. Real “anything goes” fighting would be as different from MMA as MMA is from kickboxing.
I guess someone could try to kick someone's groin and maybe get one through. An MMA fighter is already trained to check kicks down so again unlikely. And if you think someone is going to drop their hands to get to someone's groin...ok.
The reality is BJJ and MMA is basically how most street fight/self-defense situations go down. Untrained people wildly throw some punches and end up on the ground.
The only caveat, which every grapplers knows, is pulling guard is a competition only thing. In a 'real' fight you never want to be on the bottom.
If we're going to go down the imaginary perfect situation, we're back to day 1 MMA/self defense lessons now. In a situation you control distance, either too far away to be hit or close enough for a take down. The fight is over in 10 seconds because the grappler has shot a double leg, put the other person on their back and is beating the crap out of them before the other person even knows what's happened. The grappler also has hundreds or thousands of fights that are about as close to reality as one can get.
As the other responder said, there are numerous videos out there now showing that grappling (MMA, BJJ, wrestling) sports are superior in any real life situation because that's how a large majority of real life situations go down.
This happened not long ago, and the football almost lost their eye...
https://www.youtube.com/watch?v=70UcLUPvotU
> only real winner in a fight is the one that walks away before it starts.
I 100% agree. After training BJJ for years, I've learned never to underestimate anyone. It's a bit counter intuitive, but the more someone learns to fight, the less they want to fight (outside of training of course).
I'd suggest there's a bit of us all "talking past reach other".
I have no doubt that anyone who thinks they can end a fight by a headbutt, finger break, or groin kick without learning to trade punches and kicks and to grapple, would be in serious trouble. I'd also say that anyone training only sporting, rule-governed elements of fighting is in a great position compared to someone who has zero experience, but will encounter some very unexpected situations when a bar brawl kicks off.
So how about this: we're all right and wrong in some measures, depending on the context? :)
(Edit: typo)
That said, given two otherwise equally skilled fighters, of course the one with more experience under the specific conditions would have an advantage.
For multiple opponents, I could certainly see that changing the optimal strategy, but it seems like the odds of winning would still mainly be a function of how strong a fighter is one-on-one, since the only hope is to quickly neutralize the additional opponent(s).