This seems to me to be a classic case of overthinking.
A good putter is better off than a bad putter on anything, pretty much by definition. If you are better on highly contoured greens than someone who is better on flat speedy greens, then, surprise, surprise, you are a better putter on contoured greens and the other guy is a better putter on fast greens.
Ayn used to say "A is A".
The rest is just excuses.
If you want to try to argue that a higher handicap golfer is better off on highly contoured greens, that is something entirely different. I'd still argue against it, because, generally speaking, the lower handicap golfer is better at everything, short of maybe the luck involved with holing 50 footers. Even there, the lower handicapper will likely have a better grasp of the proper speed, so he has a better chance there as well.
I'm a pretty good putter, as compared to many golfers who are mid to higher handicappers. It's probably because I have very good vision and am okay at reading greens. I'd bet a lot of money that Scott McCarron, pre long putter, having quit playing after his career at UCLA due to his frustration with the flatstick, was still a much better putter at that time than I am now. Flat greens, highly contoured greens, whatever. Maybe - maybe - I might be better at 5 footers if he was yipping or something, but I doubt it. He was a lousy putter compared to his peers, not compared to bad golfers or bad putters.