Is ACC approach to pick one car and then race with it?

[wlashack]

Hello,
my question may sound silly but I am GT7 user where it is usually about changing cars/tracks. If you race on different track, you do not tune your setup, you pick a different (more suitable) car instead.

Now I am trying get into the ACC world properly and it seems to me like there is a different approach — pick one car and race with it (like in real motorsports world). Tune your setup(s) but stick with your favourite car. And my question is — am I right? Is this the way ACC is meant to be played?

Thanks.