That is what people mostly race, but not all. Different cars also has fair amount of fans, even though some may have harder time to succeed at gathering up full servers. Thats undeniable. But it is definitely not absolute like you have short sightedly stated. At some point different kinds of vehicle, more variety, will be way to win more people to come to use this software.
I am not arguing that these cars are very planted IRL, I very much agree, but my idea is that they are less planted. Perhaps it is hard to understand that a guy things that something what is a lot, should be less, and it would still be a lot... I come from AC, ACC and mainly observing real life, because IMO you should be aiming to simulate real life, not the other simulator, right ? Trying to get technical, I would describe rF2 cars being too planted as tolerating slip ratio too well, and load sensitivity is not as biting as in AC/ACC. And what I perceive from real life seems more similar in ACC to me. Grip varies in more dynamic fashion, and those cars has rather narrow optimum performance window which you should be able to drive in. It is all very technical, and actually difficult to talk in such generalized fashion. So I am not surprised that initially such talk seems nonsense for people who has not even a slight observation on these things.
By the way, my point is that there hardly was any car that super obviously should handle very edgy from S397,and there probably is not going to be. In such way they produce cars that has the most appeal, undeniably and sadly. Also in such way we have a top realistic simulation filled with cars that are as arcadish IRL as possible

so you have perfectly legit simulation, that is arcadish as possible while keeping the integrity of a genre

Of course it is mega difficult still to reach top pace and consistency, but my main point is some of the basics of car performance at the limit. You can see from the videos road going Senna is scary and twitchy at the limit, GTR is not going to be so.