this is a really good point. dealership lobbying is so weirdly under-covered and yet affects so much of our lived experience - from crash safety, to pedestrian experiences, to lemon laws. when I worked for the state consumer protection agency many moons ago, we had a drag-out fight with dealerships in the state legislature trying to advocate for having at least a nominal lemon law on the books. the original proposal would have protected consumers quite a bit - but it was quickly defanged with enough money flowing into the campaigns for the right rural legislators who sat on the right committees. I imagine this is the case everywhere with our legalized corruption system
Even the law that forces there to be dealers.
In theory you should be able to buy a car on line just like anything else on Amazon.