And those 9.0's are hand timed records, and are distinguished from official world records, because hand timing is considered unreliable.
McTear's 9.0 was at a high school meet - nobody believes he was the fastest 100 yard man on the planet at the time, and he never proved it in a timed event. His best official 100 yard time was 9.3.
You should also look at the competition in those days. Almost all world class sprinters were diminutive, and of the few that were taller they were still very lightweight. Nobody was running against a 240+lb man.
But even aside from that, again, I didn't say smallish runners can't run and compete, I said fast starts are "typically" (didn't say always) an advantage for smaller runners, and I said that "may" (didn't say definitely) be a benefit to Parsons at 100 yards, so you aren't even arguing within the context of what I said anyway.
And those 9.0's are hand timed records, and are distinguished from official world records, because hand timing is considered unreliable.
McTear's 9.0 was at a high school meet - nobody believes he was the fastest 100 yard man on the planet at the time, and he never proved it in a timed event. His best official 100 yard time was 9.3.
You should also look at the competition in those days. Almost all world class sprinters were diminutive, and of the few that were taller they were still very lightweight. Nobody was running against a 240+lb man.