I get very frustrated by Internet posts that act as if there has been a million years biological evolution in the past 75 years. The truth is we will never know if players from the past would be as dominant today. Bobby Jones was about the same size as Rory, Nicklaus and BJ Holmes have similar builds. I am convinced that most past greats would still be great today, just like current golfers their skills would benefit from modern training, video, balls and clubs. Compare each their own era, rate their success against their peers. If anything you could make the case that given inferior equipment, tougher travel, less year round play, less well groomed courses that previous greats were more accomplished.
It's not a simple matter of biological evolution, it's more and better effort being put into a cause. More like, the cause itself evolved since their time. Had Hogan been born in today's time, sure he probably would be great.
But I don't think these (already pointless) discussions make any sense in that frame of logic. We just talk about the actual player that was witnessed playing years ago versus the players of today. That's not a contest really.