Aren't the CAFE standards to offset the emissions and damage caused by them since you can't directly bill that to an individual user of a specific car? It seems

Aren't the CAFE standards to offset the emissions and damage caused by them since you can't directly bill that to an individual user of a specific car? It seems like it would be better to just add a carbon tax to gasoline but I assume that is significantly more unpalatable than the CAFE standards. Tesla's portion of a tax with similar intent is baked into the cost of electricity so consumers pay for it gradually rather than in a lump sum when purchasing the car.