You're talking about "on the mats," between two people of comparable skill-level. Because "on the streets," there is more involved than brute strength and size.
The weaker may beat the stronger with:
- superior strategy and tactics
- superior martial skills
- dumb luck
If this were not so, then the species would have died out a long time ago, I suspect.
Homo sapiens sapiens (modern humans) out-stripped
H. sapiens neandertal (Neanderthal humans) despite compelling evidence that Neanderthals were much larger and stronger than
H. sapiens sapiens, yet possessed comparable intelligence. Why didn't Neanderthals just beat the crap out of Sapiens and steal their wimmin?
We'd all be big, honkin' hybrids today. Frankly, I wouldn't want to think about what this might mean when it comes to hirsuteness for the women...