there is nothing wrong with that. as a PC owner and player i am glad more people get to play the games. i'll probably double dip on Death Stranding for that reason.
however this thread is about "Do you really need to buy a PS5?" and as a person who is considering buying a PS5, i say yes. it has nothing to do with "my dear exclusives" because i am not a console warrior, i own PS, Switch, and PC. i can play them all. one can have a preference without hating a platform. buy a PS5 if you want first access to these exclusives. the fact that they get ported over later to PC is great, but i don't want to wait. i would rather have the games now. i will pay for that convenience.
my reasons are many. but since you bring up 30FPS, in all my years of PC gaming, framerate has never been a constant. you can buy a top of the line computer one year, have it running new games at 60FPS, max settings. next years games will push the envelope, you'll have to lower those settings maybe. then the year after that. then 5 years later, a new game comes out, and your top of the line PC is doing 30FPS on max settings. you have to upgrade. true, you can catch up again but you will always be chasing that dragon. a PC is not a guarantee all your future games will be 60FPS.