In a way that's a bit of a clickbaity title. It could just as easily have been titled "Why are people so unhealthy"; most women aren't exactly Olympians either. Women have similar rates of obesity to men, almost as high a prevalence of smoking, and rapidly closing the gap for alcoholism.
Anyway, I think there are sex-specific factors at play here, although this article unhelpfully rolls them all together: genetic predispositions, lifestyle choices, career, mental health and suicide, engagement with health services. It's not unheard of for young men to have lifestyles that on the surface are impeccably clean and ascetic, only to one day snuff themselves out through suicide or misadventure: did this person live a healthy or unhealthy life? There are at least a couple of metrics that could be used.
Without wanting to devolve this into a long, bitter Manosphere-style rant I suspect most of the sex differences, both in health and lifespan, are mostly social in nature. There's a vicious cycle in play where men are less likely to practice self care, pursue careers in certain fields, or access certain types of help, and in turn the system remains stacked against those that do try bucking the trend. I could give the example of my own attempt to access NHS mental health support when at my lowest ebb ("Hello, are you suicidal? No? We'll send you a photocopied A4 page on mindfulness in the post, good luck"). I could point out the way that men are encouraged to open up about their feelings and show emotion, but are invariably mocked or ostracised when they do (frequently by women). Disparities in criminal sentencing, usually based on the circular reasoning that women are primary caregivers. And so on.
