I never said that Ali wouldn't dominate at a lower weight class being flawed, of coarse he would, look at Roy Jones (who doesn't have Ali's chin). all I said was that it is easier to get away with being technically flawed at heavy than the other classes, which is true. Because at heavyweight, size speed, and power often trump technical skills, more often than at the lower weight classes. Jimmy Ellis had 100X the skills than George Foreman, but Foreman's walking through him and is going to KO him in 3 rounds. Yes, there are occasionally the John Mugabi's at the lower weights.
Heavies can cut corners because they can get away with it more often than at the lower weight classes. as far as athleticism, there are no Dominique Wilkens' in the 1920's, whether they had supplements or not or whether basketball was a major sport or not, no one of that era has the athleticism to do reverse dunks, or 360's, especially a 6-7 person of that era, who would be lucky to walk and chew bubblegum; Jim Thorpe, the best athlete of the first half of the 20th century, wouldn't even place in a High school decatholon today. And I don't care what supplements he takes, what shoes he wears or what track he runs on. No fighter from the 1920's has any where near the pysical tools Mike Tyson has, especially at 220 llbs. Interesting, you complain about the holding and mauling of today (okay, I'll grant you that) then you praise Johnson, Jeffries, and Sullivan- that's all they practically did.That was the way they fought back then. Of coarse everyone views them with stars in their eyes. as far as a bare knuckle fighter like Sullivan(who holds his fists vertically) competing today, come on. Jim Corbett, who beat him, got KO'ed with the "deadly" solar plexes punch. last point; I notice one thing in your criticism that you didn't address was "why hasn't there been a sub 190 llb champion or major contender in the last 45 years ?" Or, "why hasn't there been any power punching heavyweight under 190 llbs in the last 40 years ?"
Those questions don't have any "ifs" in them.