That other countries have the same or lower levels of transmission do not matter to the authorities that tries to lover the number of new cases in their own country as long as not all countries are implementing the same rules at the same time to put the brakes on CoVid19. They look at their own numbers and say what kind of interaction is causing the most new cases and what can we do about it. You are going to have a hard time selling to your voters that all bars, cafes, restaurants and toyshops should close but international travel should remain open, if international travel causes four times as many outbreaks as domestic entertainment. Most have accepted that they can't have their foreign holliday this year and that business meetings are now online, but if they can't have their fancy coffe or shop for christmas presents you will have an uproar and a high amount of uncompliance on your hand.
Unfortunately the airline industry is providing a product that currently is seen as more optional than a necessity and that is what goes first in a crisis. In Europe it is not helped either by the airlines pushing prices instead of actively encouraging pandemic restraints like socuial distancing because "it's so difficult and expensive". That attitude is not helping to sell that luxury. When will airlines do something to help themselves out of the crisis instead of insisting on waiting for publically paid help like free preflight testing and scaring many away not by actually filling every seat but having the possibility of a stuffed flight hanging over all potential ticket buyers.