If he had won those 5 times, the other guy would have 4 titles. See how that works?
No, it doesn't work that way. Federer on 5 occasions was unable to beat the GOAT at the tournament. It's not like I'm giving Federer 5 titles but of those 5 occasions it is difficult to argue he wouldn't have won the whole tournament at least twice and that's being conservative. On top of this there's Wawrinka but I'll concede Federer isn't beating Djokovic on clay these days.
Out of 6 years in his prime, Federer was stone-walled like Roddick. It's quite simply.
Now if Kuerten showed more consistency I'd undoubtedly put him above Federer, but he, like Wilander and Lendl just didn't produce as much over the long haul.
Federer at the French is 65-16, or 80.25%
Kuerten at the French is 36-8, or 81.81%
The win percentage is nice but when you play 37 less matches, that 1.56% advantage doesn't add up as nicely. His victory against Roger was 6-4, 6-4, 6-4. Watch the match and then acknowledge Federer was not yet 23, not yet in his prime and that it was a pretty close match.
In 2000, Kuerten beat Magnus Norman in 4 in the Final.
Needed 5 sets to beat Ferrero (19 years old).
Needed 5 sets to beat Kafelnikov.
He was down 1-2 in both those matches and while the comebacks were nice, it showed where he stood. He was not a dominant French Open Champion except for one run.