Sony says it will take "at least a year" for exclusives to reach PC, unless they're live service games
Source
Still not ruling out red tape, but you've got a point there, also.FOMO. Fear of missing out. Simple as that.
Tempt a guy to get the PS5 and the exclusive asap to be able to immediately play the game.
If you got patience and don't mind waiting, then, well, eventually the game will be on PC shrug