Its the Tragedy of the Commons. No single individual really has an incentive to stop flying, outside of the marginal impact on PR. So everyone just says its someone else’s problem.
The FAA is toothless. The EPA is toothless. The individual industry leaders are more legally beholden to shareholders than any regulatory body. Even in aggregate, the emission volume of flights pale beside the emissions caused by coal stacks and automotive emissions and bunker fuel from bulk cargo shipping, so its the billionaire equivalent of saying “At least I’m recycling” when pushed about what you’re doing to curb greenhouse gases.
At the end of the day, what we need is a comprehensive investment in high speed mass transit. But fossil fuel companies hate that. Aeronautics companies hate that. Politicians fixated on quarterly budget figures hate that. And the folks that would actually build rail in this country no longer exist.
So whatchagonna do? Shrug, blame “the system”, and go with the flow because everyone else is doing it.