I know you wrote this more than a month ago, but every time I feel despair about anyone being fair, you write something like that that is really fair.
I don't know why people are hell bent on proving that this or that player does not deserve credit for what he's accomplished. Of course at any moment a player can get lucky or unlucky. We see that even with BPs, where a player wins converting nearly every break point and saving nearly all of them on serve, while another is absolutely dry. There are easier and harder draws. There are periods where competition is tougher or not tougher.
But I don't think that things have been consistently easy or hard for any players for the past 20 years. Taking only Novak, doesn't it seem pretty obvious that he's has some easier years, where his best competition was weaker? Doesn't it seem that at the time he was establishing himself he had a really hard lot, with Fed still playing very well, with Rafa perhaps hitting his highest level? It seems to me that the top players have all had lucky periods and hard periods, but over careers as long as theirs it just seems like luck and competition gradually evens out after such long careers.