What you're saying doesn't make sense though. If they held out on getting a PS5 due to this game and as you said "already had a PC" they would have been asking for a PC version to not spend $420 or whatever it was. Why are they asking for a PC vers now that it's $30 more? If you had a PC already you would be asking to save $420. Not now to save $30.You'd be surprised how many people hold onto buying a console until x game comes out, I've done that myself for both PS4 and 360. SX is the only console I've bought in launch window.
I can see people who wanted a PS5 specifically with FFXVI being a little peeved that they have to pay 20% more for the console now and/or have to wait an uncertain amount of months before it comes to PC.