The US government created this issue by exempting trucks and SUVs from fuel economy standards imposed on cars. That was the initial motivating factor behind car manufacturers pushing these large vehicles. Now it doesn’t upset car dealers that they can sell them for more money. Also, consumers feel safer in larger vehicles… largely because all the other vehicles on the road are now bigger and will do more harm to smaller vehicles. And, because it’s America, there is a special individualism factor baked in that prioritizes ego over rational sound decision making for the collective betterment of humanity and the environment.