[jfitbsidbfb]

The point is not that they're more common. Anyone that has wanted a fast car in the last 60 years could either buy or build one. Even a regular old car is plenty enough to kill yourself and plenty of other people if you're reckless enough. Besides that, it's much easier to create a stupidly dangerous car through sheer neglect of tires/brakes than to actually buy one that way.

Your argument is comparable to banning sharp knives because someone started selling them cheaper than butter knives. Both types have always been sufficiently available and dangerous that making one more common than the other isn't going to change anything