I doubt most current PS5 owners are price sensitive. Hell, they may have even paid extra for a scalped console
I am willing to bet that anyone who bought a PS5 so early into its lifecycle is itching for new and exclusive content that you can't get anywhere else. Returnal being a hit and a graphical showcase bodes well for its sales prospects.
Besides most gamers are buying games digitally now and it is doubtful Sony will reduce the price of this game on the PS Store any time soon.
I own a PS5 and I'm gonna wait. Resident Evil is around the corner and much cheaper in the UK £55 vs £70. Ratchet and Clank is a title im gonna comfortably throw down £70 for however
but yes, the game will for sure have the benefit and cushion of early adopers eager to try out something built for the PS5