So would this imply men should be healthier than women? Body builders healthier than other types of athletes?
Replying to your question: if you compare two identical women differing only in their percentage of muscle mass, yes, one is healthier than the other.
As for the body builders; this is a tricky question, but I don´t think they are healthier than the general population...muscle mass being completely irrelevant.
EDIT: Rest/Recovery is necessary. Specifically, it's important not to increase the amount of metabolic requirements you stress yourself with too rapidly before the body has time to adapt. The body can adapt to stress and become stronger (hormesis) but it takes time, rest, and nutrition.
Depends what you mean by "healthy." Plenty of overweight people live long lives.
I don't think anyone would disagree that muscles are desirable and that exercise helps, or that being overweight is a bad thing. But there's quite a lot of disagreement about the severity of the problem. If you look around, there are many old and overweight people. They got to that point without having the kind of muscle mass you're talking about.
A more persuasive approach is probably to focus on the benefits, rather than the implied downside of not having "health." For example, I had no idea that exercise would have such a profound effect on my brain. My mind is sharper when I exercise compared to when I don't. At least, it was true for me. Could be placebo effect, but, then again, the placebo effect is measurable, so sometimes it helps.
As an aside, long-term (which is where we really care about "healthy" anyway), you would probably expect body builders to be healthier than some classes of athletes, with various circumstances obviously influencing that.
Professional sports are notoriously rough on the body (and mind) long-term. It's not a secret that athletes in certain sports (e.g. american football, boxing) often have debilitating health issues in their later years stemming from their career. I'd say Arnold is doing a hell of a lot better health-wise than Muhammad Ali, for example.
“Strong people are harder to kill than weak people and more useful in general.”
See: Einstein, Newton, Aristotle, Tesla, Edison, Stephen Hawking et al. Brain has proven to be vastly more important and useful, than brawn, for thousands of years.
Bill Gates being particularly strong would not add anything to his overall value proposition, in fact I'd argue it's entirely irrelevant.
And I wouldn't swap with Stephen Hawking, so presumably I value my strength levels and lower intelligence more highly than his much, much greater intelligence and virtually non-existent strength.