No it wouldn't, are you saying that a hypothetical 600cc car built by Kia driven by a 40 year old man will cost EXACTLY the same as a hypothetical 600cc car built by Porsche, Mercedes, Aston Martin, Rolls Royce driven by the same 40 year old man?
No!
You are getting a bit hung up on the shorthand labels being used here.
The point is that person A buys a "fast" car that is sporty, aggressive in appearance and full of features copied from racing cars. He will be more likely to drive it fast and have more accidents.
Person B buys an "alternative" car. Now it could be aimed at being green, be a hippy car, be a cool crusing car, very comfortable, cheap, classic or any number of other types of car. This person is less likely to drive fast and so will have fewer accidents.
Now there are lots of posts showing us a classic car, a fast car that is safe, a slow car that is driven fast etc so it is difficult to pin things down to one example in each group.
The car person A buys feeds his speeding behaviour. The car person B buys feeds his safer style of driving. Now quite rightly if you put person A in person Bs car he will possibly still drive like a nutter. But over time the mindset of person B and the car choice of person B will take over and we will have fewer nutter drivers on the road.