http://www.mercurynews.com/2017/06/1...he-new-barbie/
Honestly, I think the columnist was using Marvel comics as a catch-all for all superhero comics (because she later spoke about starting a campaign against DC comics).
While I do agree that various body types should be reflected in comics (anyone can be bombarded by cosmic rays or get a Nova helmet), I don't agree with the assertion that people shouldn't aspire to look healthy. As someone that's had some ups and downs with their weight, I completely reject the argument that people attempting to find a healthy weight is in "vanity". That's complete rubbish considering the fact there's a direct correlation between health and weight.
For my money, I don't see anything wrong with young men aspiring to look like Superman or Batman. I don't support people starving themselves or whatever but there are healthy ways for people to achieve a healthy height/weight balance.