If PD had a track record of being punctual you might have a point, but delivering features years late (if not the games themselves) has been par for the course since the mid/late 00's. GT7 being bare-bones and riddled with mobile "gotcha game" features is not Covid's fault, nor the fault of worldwide market disruptions in nearly every sector. From Soft and Polyphony Digital are about the same size, (~330 to ~300 employees, respectively) both based out of Japan, and both started full development on their latest releases around 2018. So they were under the same government restrictions during Covid, yet From managed to release a revolutionary title in a little less time from Sekiro to Elden Ring than it took PD to copy/paste GT Sport into "GT7", scramble the mechanics/pull many features/tweak the engine, and dump the result onto the market. Both re-used previous assets, but From was fighting an uphill battle in developing their first open-world title while PD was creating another sequel (though one could argue GT7 itself is breaking new ground in the amount of psychological manipulation that has been built into the economy... behavioral psychologists don't work for free, after all!)
So what is the x-factor in Elden Ring's success? More than likely, Miyazaki is a far better studio head that knows how to manage his resources properly, whereas Kaz is still trying to be a race car driver and had been working on Sophie, a feature we'll probably never see, instead of getting his game ready for launch. 300 employees and only 15 are car modelers... It's no wonder we went from 1100 cars in GT6 down to 425 in GT7! I can't imagine how over-worked those poor souls are...
I know this isn't from the post I replied to, but strong initial sales mean nothing. Cyberpunk 2077 sold an enormous number of pre-orders and launch copies, and CDPR is still trying to dig themselves out of that hole. I bought GT7 on launch, a lot of my friends bought it on launch as we all grew up playing GT in the late 90's/00's. I'm the only one that still plays out of my friend group, and I've only played a couple hours since 1.15. Nostalgia, promises of a "return to the series roots", and being one of the very few PS5 games in Sony's stable sold GT7. From everything I've personally seen, very few people that bought it on launch are still playing it. You'll always have the 10-20k hardcore Sport Mode players, but if you lose the casual audience you're losing the vast majority of your player base. TLDR: I don't think this game is anywhere near as healthy as you presume based on launch sales alone. Just speculation on my part, but saying copies sold = active players is speculation as well. Until we get some type of PC release in order to see average daily players none of us really knows how healthy (or sickly) GT7 truly is.