Depends what you mean by hurt it. In terms of individual title revenue, it would hurt it being only on PS5 due to the limited number of them owned. If Sony offset any 'potential' losses, then maybe not, sure, from a purely isolated revenue perspective. But if it is trying to drum up mass appeal of a 'dormant' IP, being on a single platform & generation at that, it would hurt it's overall marketing appeal - there are other aspects that feed into their bottom-line i.e. merchandising, the purported movie in development, even pachinko/gambling machines utilizing the MGS moniker etc.