This news only proves your "god" Rogie didn't have mono in the first place. So take it easy and relax.
How would Federer not have had mono? When I got mono, it only lasted about 2 weeks tops. Sure, I was fatigued and such for several weeks afterwards, but the main issues happened in those first two weeks. Either way, certainly not as severe as Robin's case. So just because it isn't making you miss out on 6 months doesn't mean you don't/didn't have mono.