Think about all the hybrids you drive in the game:
Suzuki Escudo Pike's Peak - hybrid.
Any WRC car - hybrid.
Any F1 car - hybrid.
Any race car at all - hybrid.
Any car created from scratch - hybrid.
Any car built based on another - hybrid.
That's just... ALL of the cars in the game then? I mean, think about it. The 206 WRC - what's that if it isn't a hybrid? It's a Peugeot 206, to which someone has attached racing suspension, wings, a really, really BIG turbo and stuck massive wheels on. Can you do that with your 206 S16 in GT3? Nope.
Learn to broaden your mind a bit more, before you leap in and criticise.