> But all those passengers aren't sad.

Have you looked at passengers on airplanes lately? I admit it's been a few years for me, but last I saw, airline passengers were, by and large, miserable. They can't wait to get off the airplane. They may prefer current air travel to not seeing their family or getting paid an order of magnitude less, but that doesn't mean they wouldn't be happier with it if it were better. And it could be a lot better.