I've said it a couple of time already: YES, racing games of all types can be enjoyed by all groups of people. The point I'm trying to make here is GT7 on PC is much different landscape than it is on PS5. GT7 has maybe one competitor on PS5 which is ACC. On PC they're up against ACC, iRacing, and Forza. I'm leaving Forza out of this cause I've never played it. But between iRacing & ACC alone there's not much added appeal for GT7.
If PD were going to do this, the time would have been when the game launched. Now that it's been released, it's flaws are well documented. ACC on PS4's flaws were well documented, and it bombed as a result.
For graphics, is that really a selling point? Gameplay is much more important than looks. Yes it's a "personal preference", but I'd highly doubt it's an unpopular one. iRacing has PS3 caliber graphics, and that's never hurt it's popularity.
And when it comes to online, GT7 still isn't really that far ahead. Yes it's through a 3rd party, but Low Fuel Motorsport has greatly improved online racing for ACC on PC. And even on a base subscription without buying tracks or cars you get more out of iRacing than GT7. And if you have invested some money in to iRacing, there's no comparing.
I'll happily buy GT7 for $15-$20 3 years from now after it's gone through a few years of free content updates. But paying $80 in the current state it's in now when I already have iRacing & ACC seems like a ridiculous idea.