Why would they limit the game in such a way? I'm not thrilled with many of the poor looking Standards and I wouldn't drive even half of them, but there are at least 50 that I will drive and I wouldn't be able to otherwise.
If we can confirm that the inclusion of the Standard cars actually prohibited PD from including some other feature(s), then questioning/disliking their inclusion is justified. But if not, it is simply whining because you didn't get your way. If you don't like them, don't drive them. It's as if the ones who dislike even the slightest thing about the game have to convince everyone they're right in order to feel justified (not necessarily directed at you, MK2).