I don’t know that it’s ‘adultery’ as such that’s the problem. I’m sure there are plenty of players quietly carrying on behind their partners’ backs that we don’t know about - but the seedy stuff that keeps hitting the news about gangbangs, picking up randoms and filming encounters with them etc - that’s what makes the game look like it has a very ugly social/sexual culture around it.
There’s a few good docos around lately about the toxic sexual culture around high school and college athletes in the US - we have the same issues here, albeit on a smaller scale.
I’ll be honest, I’m a lot less interested in the game than I used to be, and the culture of these guys being treated like gods and given free passes for awful behaviour is part of it. Not the whole reason, but part of it.