I would only add that Wilt was 36 his last season in the league. As a comparison, Tim Duncan is averaging 18 and 11 and turns 36 next month.
So, what I'm saying is that Wilt was not yet in the grave for those 4 years and it could be that he was beginning to face better players.
That's not to say I don't think Wilt was the greatest of all time. I just think his god-like stats would have never happened in the 1990's...and his legacy simply wouldn't be as amazing as it is.