You’re only taking into account pollution and i bet you with the barrier of entry and cost accounted there would be less pollution from flying compared to driving.
Why not? Less risk of being hit by a plane if they’re in the sky and requirements for a pilot license are much stricter. In a plane crash occupants are more likely to die than innocent bystanders, compared to cars that are designed for safety only for those on the inside.
As opposed to under capitalism where you have to cross your fingers and hoping that one of those winners will offer you a job with living wage, while another doesn’t charge you an arm and leg for housing.