So students of his that said Gene was the toughest guy in grappling even in his 60s were delusional? Bob Wall said nobody could submitt gene.
Catch wrestling has also lagged behind the groundwork development of BJJ. We have challenge matches to prove that
What challenges matches are you referring to? There were clearly things that catch-wrestling was doing, be it Japanese catch, luta livre or Western catch-wrestling, that BJJ wasn't and vice versa; BJJ's system of positional hierarchy was a huge thing, as you can see in the matches of Royler, Rickson, Royce and Erik Paulson when they competed against Japanese catch guys (including Shamrock).
At the same time, there were a lot of things catch-wrestling was doing that BJJ benefited from absorbing as well, such as the use of the DWL/Kimura from the feet, from bottom, from various positions, the use of leglocks, submission-chains and dynamic submission entries. The use of wrestling to set-up submissions was also a big thing.
The anaconda choke itself came directly from catch-wrestling (Brazilian catch-wrestling) to BTT.
Both styles learned from each other. Daisuke Yamajii, the first Renzo Gracie guy to master leglocks, was, as his name indicates, Japaense and studied Japanese catch heavily. Tons of BJJ guys benefied from the insights of luta livre masters like Pequeno Nogueira, Leitao, etc. Masakatsu Funaki basically innovated the K-guard, which ended up coming to others via his student Ken Shamrock and right now the K-guard is all the rage. Look at Minoru Tanaka setting up leglocks from half-guard at a time when you weren't going to find BJJ guys doing it.
The Americana came from an American wrestler who learned it from old-timers that were still doing submissions because they came from a time before scholastic wrestling and totally barred "punishing holds."
Everyone learned from everyone. And as far as Gene Lebell, his accomplishments speak for himself. But it is silly to expect an old man to face off against someone in their 20's or 30's. My high school wrestling coach was an Olympic silver medalist and the first American to win Tbilisi; even at his old age, you sometimes saw him pushing people around the mat. One time, he basically made me do cartwheels with his wrist control. That doesn't mean that I'd expect him to get on the mat competitively against young people in their physical prime for the honor of American wrestling.