@GM4Him It's up to the weak to commit to being stronger. All you described is weak will, low resilience, and generally deceptive behavior. Cutting them off only creates taboo's for tempting. It's up to individuals to better themselves. Which has nothing to do with the hobby.
If a game or whatever was enough to destroy a relationship, by proxy or otherwise, that's a you problem. You didn't deserve a successful relationship in the first place.
Sex is not a drug nor harmful in anyway. It's the people that are harmful and it doesn't even have to involve sex at all. Sex is often the scape goat for more complicated issues that inescapably come from people.
Sorry you have that all wrong.