The existing cars on the road make at least some of that regulation necessary or at least not unmotivated. That and consumers tend to want a bigger car than th

The existing cars on the road make at least some of that regulation necessary or at least not unmotivated. That and consumers tend to want a bigger car than their neighbour either for safety or bragging rights. One thing that always annoys me in the UK is people who buy big SUVs because they live on wet leaves and maybe a slightly muddy road. Totally ruins a lot of British roads (and kills people), and keep in mind that all modern cars have been worked on by a team of vehicle dynamicists to make sure they are safe and stable in slippy conditions. The number of people I've spoken to who don't causally understand why the car has a gearbox (and thus what gear to be in, in said slippy road) is too many. F1 cars have also gotten a lot bigger this year due to crash structures since there were a few pretty bad accidents involving cars basically splitting in half recently.