I competed in powerlifting. Although my best training deadlift was 610 at a 180 bw when I was 19.

Most impressive lift I saw was a 650 deadlift by a 148 lb guy in college. I was once qualified to judge powerlifting in high school. But with the technology of squat suits, knee wraps, bench shirts, deadlift suits and belts; records will get broke more often now. Many lifts are gifts. Some of that shite looks like it would provide me more protection than what I wore in Afghanistan.

However if you powerlift and don't do jackshit of anything else you won't be much of an athlete. Although your potential to be a better athlete and learning explosive movements is better. Grappling strength and gym strength aren't one in the same. You are forgetting the said principle.

And Royce didn't invent bjj. Count Koma came from Japan and taught Helio Gracie and his brothers. Who in turn may have modified some techniques and put more emphasis on groundwork as opposed to standup.which is why the gracies in helio's era were successful against many of the top wrestlers and judoka as at the time. Except for Masahiko Kimura and a couple of other guys.

During Royce's rise in the early 90's he wasn't even the best of the gracies. His brother Rorion was a promoter. Rickson was not only more skilled but more athletic. Royler was smaller but more technical. Then you had the machado brothers, renzo gracie, and many others.

I think Count Koma even grappled with Teddy Roosevelt.

I'm telling you right now Ronda rousey would make me tap no questions about it. I don't have the plethora of grappling knowledge she has. Yeah I may be able to power out of something but I sure as hell will tap if she were to put me on a knee bar or heel hook which she would be able to