How dare you stand in the way of regular people burning hundreds of kilograms of fossil fuel in order to spend a couple days at the beach? /s
Also: https://en.m.wikipedia.org/wiki/Fuel_economy_in_aircraft
How much pollution is okay? Why not argue for efficiency standards rather than bans?
Everything could be said to “harm people”. Banning travel could make some people depressed and who knows what that could lead to? Or it might lead to a less connected world and less familiarity with people in other places, and maybe makes wars more likely?