True, sports do move on. The point I’m making is that that doesn’t mean the previous generation of players are rubbish in comparison to the current generations. if previous generations of top players had had access to today’s training methods they would still, in the main, be top footballers. Gascogne, Best, Pele, Cryuff etc would still be great players IMO. The players today who are based on ‘covering every blade of grass on the pitch’ runners/athletes would not have made it back in the day. Ultimately, you can’t compare. It’s comparing apples with oranges which is why to try and downgrade previous generations of footballers is wrong.
Transport the players from the past into the present day and they would be training in the present days style so it’s the skill levels that would tell. You can’t say a player is better because he’s fitter from a different training regime. The current players have proven themselves as top players but plenty from the past would be in and around there. Unfortunately in our lifetimes in the past we haven’t usually had as many good ones at the same time as we have now.