It all depends on what you mean by modified. But apparently you're saying they look terrible with cosmetic mods, which is not necessarily true because you can still have a nice close to stock looking BMW. Unless you don't like that look either and you just like how they look completely stock. I agree that they look good already stock too though but I wouldn't mind a cosmetic mod here and there or something.
There's plenty of room for correction and modification, who said BMW's were close to perfect?