Let me threaten to rob your place. Then, I will say, let's go compete in a tournament game that I supposedly am enrolled as a national team against nobody. If my team wins, then that gives me right to screw your house. If I lose, I will just not do that.
Sounds like a totally fair and balanced trade. Honestly, MC isn't getting anything. Being "not harassed" isn't an advantage. It's a different story if the bet is that he's gonna stop looking for women + his women are all shifted to MC. Even then, MC has to agree on his own volition. EVEN THEN, The girl that's being prized has a right to refuse since she's not his property, thus an independent being that has the right to choose whatever she wants to do.