As opposed to being allowed to externalize their emissions to the death of the rest of us? I agree that current taxing of ICE vehicles is not optimal, what should happen is that gasoline is forced to be carbon neutral and pollution costs associated with lubricants and other fluids are built into the prices of those too, but the present situation near universally has been the opposite extreme where ICE costs aren't internalized one bit, and in fact often actively subsidized.
>You can call that a "market" if you want.
I will, since I know what a "market" actually is. Free markets are creations of government and tools of society, ultra scalable economic optimization algorithms. They require being reasonably far along the spectrum of things like cost internalization and information symmetry, the core point is that the price embodies all the costs as well as any floors society desires. That way each individual purchaser can allocate their own resources in as optimal way as possible.
The current anthropogenic global warming mess is precisely because we don't have a Free Market in vehicles, electricity, etc since they're allowed to dump an enormous amount of their costs onto everyone with no reflection in the sticker price. The result being trillions and trillions of dollars/euros all of us are and will have to pay to deal with the mess. And of course some of the damage will be irreversible at any price.