Many magazines feature body builders, whatever their sex be, that have a body fat percentage that is very unhealthy and were it not for the muscles to move their mass up, the fat percentage alone would give them a rather low b.m.i. if they had average muscles.
I do not see how their sex is relevant for the politician's stated goal of promoting health.
If their desire would be to only promote female health, male health be damned, then they should have said so, which they obviously never did, as that would raise quite the eyebrows.
But their real desire was, as said, simply to ban models whom they find particularly ugly, and “health” is simply an excuse, as it often is. — the very same reason why arbitrarily alcohol is quite legal in many jurisdictions where other drugs are banned for “health concerns”.
So many unhealthy things are perfectly legal almost everywhere that I find any politician who claims to do it for the health dubious by default. — it is nothing more than a rationalization to justify his moral and fashion control.
Body builders, especially female body builders were completely irrelevant to discussion about fashion models. They were not the ones who were ever shown in those magazines. In terms of body shape, they are not actually thin despite having low fat.
Female body builders are not contemporary beauty standard and never were.