Sure the game evolves and you can't compare players in different eras. But it also isn't fair to current players
By definition a game less evolved it's easier to dominate because there are more things you can be better at than everyone else. If everyone is a 5 you can be an 8 and be incredibly dominant, but if everyone is a 9 you can be a 10 but there aren't many more things to improve at.
Also players now dedicate 99% of their time to the sport, I don't think it's fair to discredit the old guys but it also isn't fair to assume they were better because they came first
In Track and Field for example the record is held by whoever jumped further, regardless of if he had better trainers or shoes. And that's the way it should be imo