The point stands though, Louis was wobbled more than Frazier, and fought inferior competition as a whole compared to Frazier. We really can't get around these points.
Frazier was decked by Mike Bruce, a tomato can. He was wobbled by an old Eddie Machen. He was slightly wobbled by Jerry Quarry in the first fight. He was wobbled badly by Manue Ramos. He was badly wobbled and decked by Oscar Bonavena, twice. Muhammad Ali had him wobbling quite badly in the 2nd fight, round 2. I think Frazier's chin was pretty good. I also think he was an absolute monster of a fighter. But he was wobbled by some lesser fighters and he only had about half as many fights as Joe Louis had.
No, Louis did not fight inferior competition as a whole. His competition was immeasurably better, outside of two fighters who beat Frazier more often than not!
Okay, yet he was countered and hit so hard that he went down in most the examples you posted. Shall we can't the times Louis was put on his backside compared to Frazier? The reality is, if anybody is more likely to hit the deck here, it's Louis.
Yes, let's count the times they were put down. Louis was put down: TWICE by Schmeling ONCE by Braddock ONCE by Galento ONCE by Buddy Baer THREE TIMES by Walcott (over the two fights) TWICE by Marciano Frazier was put down: ONCE by Mike Bruce TWICE by Bonavena EIGHT TIMES By Foreman (over the two fights) They were both put down ELEVEN TIMES in their professional careers. Joe Louis was decked by SIX different fighters, Frazier was decked by THREE. But Louis had about 69 official record fights, Frazier had 37. Also, I'd argue that all of the men who floored Louis were either world champions or known as hard punchers. Galento and Buddy Baer might be regarded as oafs but they were powerful heavy men, 230 and 240 pounds, and had a lot of brutal kayos on their records. And I'd say FIVE of Louis's knockdowns happened when he was past his prime. The idea that Joe Louis was being knocked down all the time is just a myth. Based on what? Frazier never fought a puncher like Louis, with the accuracy, speed and power combined, so why is LOUIS more likely to hit the deck? The facts certainly don't back that up. By all means, I agree that FRAZIER has a great chance of decking Louis too, but there's no basis to claiming he's LESS LIKELY to be floored.
All of the people who dropped Louis were both highly ranked fighters at the time, and renowned punchers. 30+ fights against ranked contenders is a lot.