what do you mean assuming its true ?but that, assuming its true, doesn't negate that the only 'big' final Federer has skipped is the WTF.
Basically you are acknowledging you are an ignoramus by not knowing that Federer played through injury in YEC 2005.
He barely recovered in time for the event. was on and off. and in the final, he was affected after going up 2 sets to love. (2 TBs)
Federer withdrew in between in Paris Masters due to back injury in 2008. But played in the YEC anyways. Played through back pain in the Murray match, taking MTO as well to get treatment.
He skipped the YEC 2014 final vs Djokovic because he got injured in the 3rd set breaker vs Stan and couldn't recover in time.