It's not about selling "just okay". PC sales were supposed to cure all illnesses and save Square from bankruptcy. These sales are not itIf these numbers were bad for Square they would've stopped porting to Steam many years ago considering this game is doing better than most FF titles on the platform
The game will not sell as much on PC as on console, and that's okay
If it was just about selling good you wouldn't have dozens of threads with thousands of replies and journalists/fake analysts writing think pieces and hounding Square about the PS5 sales.