There are rules in Judo, you cannot just do anything.
It's so easy to talk. Do it in real life is totally different. You need strength to get into position, you cannot just assume the opponent is moron. If they know defense, it will make it so much harder to get to the right position. During the interim, it likely to be muscle that make of break the situation.
Like I said about fight between Royce Gracie and Matt Huges, Gracie just don't have the strength to prevent Huges from flatten him out. It's so obvious if you watch the match. It's raw strength to tussle for position. All the technique of Royce Gracie did not help him. He got TKO the first round, it's wasn't even a close fight. Huges just over power him, period. That was a really sad ending to Gracie. Old school, didn't believe in strength training. He got no muscle. He's lucky the referee stopped the fight, or else it would really get ugly and humiliating.
As much as I like cane fight and MA, I still spend half of my workout on weight lifting. If I have to choose one or the other, it's a no brainer, I drop MA in a heart beat.
Ha ha, it would be very educational to have an UFC fight, get the best UFC fighter at 140lbs against an average 180lbs UFC fighter, make sure they are same height. Let them fight and see what happen. I bet it won't last half a round and the best 140lbs one will get KO.