Granted, they will have to know how to properly administer the moves, but there is not much defense to r n choke, and defending arm/knee bars takes the knowledge and proper skill to defend.
I was reflecting on my own street fights back in the day, and out of 9 total, 6 of them went to the ground. There are certainly times when a one punch KO plays out too, but imo the fight goes to the ground, by circumstance.
I agree, almost all the street fights and bar fights end up on the ground, and I also agree that the majority of the time the people trying to do special holds and submissions don't know how to properly administer them, and that is possibly why they never work. I have broken many r n chokes and sleepers, and I've never had anyone get me in an armbar, and I don't think I ever will let someone get me in an armbar, LOL!
Perhaps there is a drastic difference in someone just randomly trying these moves in a fight compared to someone actually practiced and perfected at administering them. Although, one of the ones that ended very badly for the guy was straight out of Marine bootcamp, so you would think he would know what he was doing, but he didn't do to well.
I said earlier, the skills are extremely useful, and every style of martial arts should incorporate some ground skills, and if they don't, then they aren't very good styles.
I still can't say I've ever seen a UFC fight that I enjoyed very much though. I keep watching, and I keep getting frustrated, and eventually I will try it for myself and either I will be made a believer in the sport at my own peril, or I will prove that regular guys on the street still have a chance sometimes. Big Country comes to mind. He should not have beat the guys he beat, but he did, and that just proves those guys didn't know how to fight. They had muscles, and skill, but they didn't have the tenacity to actually fight.