In screenshot and especially closeup it is easier to tell.
But during gameplay and even on replay it is not as bad as people make it out. For example this Toyota is standard and many others as well in this video:
People who play in cockpit view have the problem so that is the main problem IMHO
The polycount and number of cars, these factors should not be considered this time
That screenshot was only for illustration, I clearly said that when you play in that view it's very easy to notice the poor quality cars as you drive alongside or behind them. They can fill the majority of your screen at times.
So what are you saying, we should only ever look at cars from a distance? We should only use chase cam to drive, not bonnet/roof, where we'll see the problems?
We know they CAN look ok, but the same can be said for anything that isn't aesthetically pleasing. It's totally missing the wider picture.