Your parody (?) doesn't work. For one, as far I as know there was never a group of "flightists" crying over the fate of non-flying humanity, blaming God or Moth

Your parody (?) doesn't work. For one, as far I as know there was never a group of "flightists" crying over the fate of non-flying humanity, blaming God or Mother Nature, talking about foolish non-flightists... There's a big difference. Avoiding death is not merely a hard technical problem. It's a moral and existential issue. If some people became immortal, imagine the whole lot of new ethical, existential problems we would have.