because it gets more attention that way... your average joe who cant tell the difference between a renault and a rag top can definitely tell that Giulia is wrapped in a strange camo design...Why would Alfa Romeo continue to drive around disguised cars after the car is revealed? Anyone have a clue?
if you didn't know it was an NSX the autojournos did a great job of filling in that info LOLIt's also handy in case something happens to a prototype. Alfa can claim that it is not a prototype of the Giulia if something like the Acura NSx catching on fire happens to the to it.
The NSX caught on fire but unless you know that it's the new NSX, you'll assume that it's just a hideously wrapped car that went up in flames.