Maybe I'm missing the point that you're trying to make but in football or most other sports there are end of season breaks that give players a welcome chance to recuperate, overcome injuries, take well deserved holiday's or just to spend a bit of quality time with the family.
The mere fact that Rafa Nadal missed Wimbledon was because of an injury that was not given a chance to recover from so soon after competing in the French Open and he has had a big loss of form ever since then.
So for every argument or debate supporting the current structure, there will always be a counter-argument or counter-debate calling for change for a shorter tennis calendar.
I couldn't agree more. Ever since Rafa's injury he has failed to perform well. Even the most recent match where his opponents in the QF and SF retired injured he was unable to beat Davydenko in the final. I sincerely hope that Rafa is not a busted flush but it is increasingly looking as though he is.