Hmm, I think this logic kinda fails because if astronauts are “not on earth”, then neither are air travelers.

Astronauts orbiting earth are just couple kilometers higher altitude

Let’s make some artificial rule like you need to be not on earth for 48 hours to be not on earth or something …

I think better would be to include Earth’s orbit as “on earth”. This makes sense even if we expand our scope of operations to other planets