If you want to go fast at the track, it is likely better to just build a "race car".
People get enjoyment from cars in different ways. I really have no desire to own a car that I can't get in and drive wherever I want to go. If that includes running it at a dragstrip across the country, then it might as well be a fast street car, eh?
If you're happy having a car that just goes fast, that you can't drive anywhere else but a drag strip, then yeah, you should just build a race car.