I suppose the same can be said of people with no significant experience in actual combat/street violence and train with a sport mentality.
I am not sure about that. I never faced prolonged combat (as in a war zone), but I did mix it up quite a bit all throughout my twenties and before. Lifestyle changes and my distaste for the hoosegow changed that and I simultaneously started competing at the university level (edit: from my late twenties onward). I have never seen significant evidence to support the "too deadly for the ring" arguments, and I probably had too many street scraps for anyone's good.
Don't get me wrong, I think MMA and competitive grappling provide excellent venues for people to hone their fighting skills. However, what I see in the first clip is just two people who grapple for the sake of grappling -- without any serious attempts to execute a good throw, choke, lock in order to finish the match or to get back on their feet after landing on the ground.
I think I can agree with this assessment. Sorry if I glossed over your intent from the earlier post. As I mentioned, the match was not to my liking for the reasons you mention. But, I think that's just an expression within these rules.
And, as I mentioned, I think Osumo is great. It should, however, be paired with other things, IMO. Although I think the line has pretty much been lost, the first generation of Danzan Ryu had a great curriculum: judo, jujitsu, sumo, kappo-sappo (healing and some black hand stuff), and other stuff. All of that mixed up with competition against multiple styles and venues made for some tough people in the first couple of generations.