I mean, think about the interesting cars that you can get in standard form.
Or think of the handful of interesting extra Premium cars we perhaps could've had if they didn't spend the time and resources updating and adding aero parts to Standard cars since it seems they actually did try to improve them (or some at least) this time around.
I'd happily trade all 800 Standard cars for 5 extra Premium ones or (considering they in hindsight were gonna be added for the simple reason GT5 included 1000 cars on the same console) kept them exactly as they were in GT5 with 5 or less extra Premium cars.
Besides this not being about the sort of cars which are Standard (as unfortunately a lot of great cars are indeed Standard) but about the things they're lacking (cockpit view) making them automatically not the content everyone will appreciate or use (nevermind the graphical aspect and inconsistency).
You can say that in essence it's the same as certain types of cars not being everyone's cup of tea but that's a subjective criteria, not a limitation in gameplay aspects.
What I don't really get is the outcry of removing 800 Standard cars for 2 reasons, one is that there aren't really 800 distinct cars to replace or remove but most importantly, and let's be honest here, if they had the same amount of Premium cars available for GT5 they'd not even be considered for inclusion and the only way you'd be able to drive certain cars would be by playing GT4.
So thankfully GT6 now includes the amount of Premium cars GT5 should've had (so giving me enough cars to enjoy) and still includes the stopgap solution to mask it for marketing reasons (less cars on a successor on the same console is a risk they probably couldn't take).
I'd happily be able to ignore them (although I did enjoy the opentop ones after they received something resembling cockpit view) but I'm afraid the separation that made that possible in GT5 (different garage section/ways to buy them) has been removed under the false pretense the difference doesn't exist anymore.
If that's kept in place (even if it's optional this time), I don't really mind they're added again for those who enjoy them, but keep in mind they won't be around forever (that includes the sort of cars in some cases) as GT7 might include less cars but all Premium quality and suited for each viewpoint preference, how dare they!