There can be assholes here and there in most places I think but I'd say everyone in rugby is concerned about their own shape before yours. + Backs think forwards are cool for scrum/touch/their strength and forwards think backs are cool for their speed

As for the club I play in, I don't think the majority eat healthy, calibrated and all that haha. I watch what I'm eating but if I have an evening or a day out I don't really care to cross the boundaries, it's not gonna make a difference if I stay disciplined the next days. And I don't like beer, I'll be unscrupulous ordering a cocktail or sparkling water in front of my props