We have a market system that lets people make up their own minds about how they deploy their resources and has been shown unequivocally to be the least bad of potential economic systems. If you disagree that aviation is properly priced with respect to externalities, make that point. Suggesting (or implying) that some central committee should decide on "essential" purposes for aviation and only approve those (obviously the aviation needs of the committee members and other elites will be essential) is incredibly ignorant of history. This has happened before and it doesn't work.