Sure it is. All health outcomes are made up of many causal components with their own coefficient.
Additionally, "physically demanding work" is also a proxy for "low probability of obesity".
Additionally, "physically demanding work" is also a proxy for "low probability of obesity".
Me: <laughs in British builders>
Besides, just seek out the data instead of spouting glib anecdotes
I haven't known many workers in that trade but all my experience is with thin and deceptively strong men who look permanently beat up from years of labor and small accumulated accidents.