Why don't they build $10,000 Ford Rangers anymore?
Consider how huge trucks that mow down children because they can't even be seen over the hood are unregulated, even incentivised. (1)
Wrong regulation, maybe. But not merely "too much regulation".
1)
https://news.ycombinator.com/item?id=36480122
https://www.nbcnews.com/news/us-news/americas-cars-trucks-ar...
https://www.vox.com/future-perfect/24139147/suvs-trucks-popu...
Fleet economy standards.