US auto-domination isn't even the result of market forces though.

Don't get me wrong, I'm not a fan of laissez-faire policy or capitalism in general, but government funded highway lanes are no more capitalist than government funded rail tracks. The current situation in the US required enormous government intervention to establish, in the form of the forced seizure of property to make way for highways, hundreds of billions of dollars (inflation adjusted) to build those highways, mandatory parking minimums for new construction (to store all the cars from the highway), government subsidies for suburban style development and later on tax schemes that resulted in poorer inner city areas subsidizing wealthy suburbs, and zoning laws that made it illegal to build a business in a residential area (which worked together with anti-loitering laws to make it so that if you didn't live in a neighborhood you had no "legitimate" reason to be there. It's not a coincidence this happened in the wake of desegregation.)

Similarly fossil fuel production in the US actually receives direct government subsidies at the federal and sometimes state level (some of which have been in effect since 1916).

Now, we can get into the weeds and talk about how government action is actually a necessary part of capitalism and the intertwined nature of power structures and so on and so forth, but it's important to remember that there's nothing inevitable or natural about the mess we're in right now, as some would have you believe. It required conscious planning and choices, as well as tremendous effort and tremendous injustice to get here.