I can’t believe people are stupid enough to think california regulations set the price of cars in other states, because they literally don’t.
Quite impressive cognitive dissonance.
Automakers, textbook writers, etc cater to the largest state they serve (or the lowest common of several large markets), then distribute the same version to multiple locations.
In the case of cars, which have to adhere to California regulations to be sold in California, that can drive up the price in other markets due to expensive parts required for compliance and auto-manufacturers standardizing.
It’s also more constructive to explain why people are wrong (eg, why you think car regulations one place can’t impact the price in others) than just call them stupid.
The way interstate commerce clause is used is to give federal government ability to intervene, not another state government.