So long as you own the disc I have no problem with what you personally do with it. What worries me is that the vast majority of people using an emulator to play Persona 5, pirated it. Atlus USA has a very slim margin to work with when it comes to profits. Lost sales of this game could very easily effect their operating income to the point where they don't have the money to westernize other niche Japanese games. I'd rather see Persona 5 come to steam legitimately, than see it so easily pirated.