There is nothing wrong with it. No one should feel it their place to tell her she is a bad role model for "being obese while a public figure". The commenter was the very definition of an asshole, and frankly a nanny stater. If people are offended by her body type they should keep it to themselves, I've worked with great people who have had life long weight issues and they are kind, good hearted, and hard working people. Those same friends are like family to me and they try their best to manage it, one of them sought professional help, the other was medically restricted in workouts due to a sciatic nerve issue that could paralyze her if she overdoes it and I think she'd be happier overweight and walking than disabled.
Like I've said earlier, I'm trying to get back into form but was built in a way that could have given me reason to judge others if I wanted to, but frankly that would have been rude, and beyond that it would have said more about me than the person being judged. You don't get people to adopt healthier lifestyles by bullying, condescending, and judging them. It doesn't happen by law or coercion, that person MUST be ready to come to that after making their own decisions, those lifestyle choices stick, vanity choices never do.