I agree that was the case and that players did endure a lot back then but had Ronaldo been brought up in a culture where you weren't protected by the refs and couldn't ask for a foul at the slightest touch, he would have endured all that as well. Just because he goes down at the slightest touch doesn't imply one bit that he actually needs to go down, but is simply doing that to get the decision. In terms of physical stature and endurance, he's easily superior to someone like George Best. If a defender thinks he can come and be physical with Cristiano Ronaldo, he can be my guest. And, imagine an athlete as physically gifted as Ronaldo, with his kind of upper body strength and sheer natural fitness, having the license to shove and push around players half his size. He'll be an absolute force of nature.
And there is an evidence for that. Pele was the greatest player during Best's era, and a huge reason for that was his insane physical frame, athleticism and brute power that towered over anyone else in the game. No one was able to cope with that kind of an athlete, something that would be right in place for the modern level of fitness. Defenders were more cynical back then, but they were nowhere prepared enough to handle someone as phenomenal as Cristiano during his physical prime. A lot of them were heavy smokers, drinkers, pretty slow in pace and nowhere near strong enough. He's one of the greatest athletes the game has seen, ever and he's the last man you would think of taking out with a 'physical advantage'.