With all due respect to the poster who questioned why MD was not hosting any bodybuilding events of their own, the answer is simple - that's not the business they're in.
They have to leave the business of running shows to the people who know how to do it. Whether they hit a home run or whether it's an absolute disaster, the AMI group has a much better team of event organizers in place than does MD.
That doesn't mean MD could 'never' do it, it just means that they do not have the ability to do so at this time. Running a major bodybuilding contest and expo is a LOT different than putting on a health & beauty show at Javits Center.