It's painful and embarassing for the "sport" as a whole when judges lose all credibility by awarding the Mr.Olympia title to a someone who is washed up, has a bloated-gut and no-arms just because he is the reigning champion and they dont want to embarass him by letting him retire while rightfully not winning his last Mr. Olympia contest.
Frankly, even if you're right about that specific occasion, are you that naive?
If you think the credibility of the "sport" is based on this type of events, then my friend, you're fuckin' Snow White. 76', 80', 81', 90',..., last year and those are just the most controversial ones. Bodybuilding's legitimacy as a sport has nothing to do with competitive bodybuilding nowadays.