No it doesn't. Her actions do that...lobbying for legislation...pushing for funding of her pet projects...Shaking down grocers to open stores in non-profitable locations are all perfect illustrations of her unwelcome nannyism. Light hearted banter with a giggly 16YO Olympian isn't.
Her previous actions are precisely why her "joke" wasn't funny and why people are commenting on it. Without her previous actions her "light-hearted banter" would not have excited any interest. When you couple that with the absurdity of a super-sized Michelle lecturing an Olympic gold-medalist about proper diet... well, it's just too much.