No argument with any of this, except maybe the far UV, that stuff is not harmless. Fact though is there is no vaccine, there is not even a decent Covid test, so who would allow free as before aviation travel?
A reality check would be New Zealand, tourism is a big part of their economy but is currently dead in the water due to immigration restrictions. Once NZ has enough confidence to allow free air travel, the airlines can adjust. But until then, I think there will be much suffering.