I think people need to realise it is all relative anyhow.
Some people seem to think that Pele was only good because the game was slightly slower and not as athletic, yet Pele was getting the same conditioning/training as these other players and so was on an even keel in that regards, he was just better at the game then most.
The game wasn't actually that much slower anyhow, it was more to do with pitches, balls and kits as you've mentioned. Some of the Brazil world cup goals are insanely good, both technically and in terms of speed of play.
One of the most ruinous points to this ever being discussed properly is using the '70 World Cup as a reference point and framing of 'football' of the old times, the notion being all games, at all times, looked like this. It's about the worst frame of reference to base any conclusions off, because even for the era, playing in such heat and altitude - especially over an entire tournament - was a complete outlier.
You can source games from 5, 6, 7 years prior to that World Cup that are far faster, aggressive, organised and full of non-stop running because they were played in proper (normal) conditions. For any United fan, there's really no excuse to not have seen the European Cup final of '68 as but one example. The preceding World Cup tournament of '66 hosted in England is about double the pace and output of '70, even. Ajax were just setting off on their journey playing football that doesn't look out of place now, in and around that time, too.
Any competition played in heat and altitude has an element of oddity to it that is present to this day. Mexico '86 was removed from the football of the 80's with players strolling about and having far more space than afforded outside of those conditions - football of the 80's was more famed for being rough and reckless culminating in the antics of World Cup '90 than it was associative of '86. The trend continues into the present era, and I'll put money on Qatar being utterly misrepresentative of the football we know, too.
So the positions of ignorance as to what football was/wasn't in bygone eras kills the entire discussion, really.
The problem piece with the uniformity of logic that states:
all that is now would be such for the modern player no matter what! Tilts the discussion so hugely in favour of the modern player as to make those from the past sound like absolute cloggers not fit to lace boots, but the fairer proposal is: you either strip them of all modern comfort and throw them into the past arenas and see how they fare or you take into account all the armoury old players would be equipped with playing in an environment that has worked really hard to protect and nurture footballers and prolong their careers. For the record, I believe it'd take years, if at all possible, to get old teams up to modern fitness standards, but that it's also an almost impossible feat to have modern teams cope with old conditions.
Regarding Pelé, there is footage of him doing things with a ball that haven't been seen in any one player since: only in amalgamation do you get to see so many skills executed. It isn't just a case of goals or trophies: it's very obvious that this is an absolutely freakish level of talent.