Just crashed into a Lamborghini!

No, you cannot compare them.

Why is an expensive bike wrong for riding around the city?

It doesn't produce more pollution and would in fact be more efficient hence requiring the rider to need as much food.

Bike vs. Car comparison is null and void.

If you buy a super car to drive at 20 mph around London. I think you're a bit of a cock.

If you buy a 6k road bike to sit next to at cafe's. I think you're a bit of a cock

The difference is the cock with the road bike is at least promoting something positive. Whereas* the cock with the super car is promoting death of our planet and little kittens. I mean look at them .....

(* used 'whereas' in disscusion = I'm right, fact)