Upvote:2
Im curious why the airliners impose these restrictions yet the medical folks cannot adhere to these restrictions?
Because they are different entities doing different things for different reasons. First of all, this has nothing with the airliners. The requirements to provide negative test on arrival come from the local governments. These governments are mainly concerned about keeping their own population safe and the economy alive. Travel is a low priority. So the government is saying. "You can enter but you have to prove to us that you are Covid negative. How you do this is your problem and if you don't like it, just stay put where you are".
The idea here is that you get tested BEFORE you hop on a plane, so it should be done in the departure country over which the arrival country has no control of in the first place. However, the departure country is in the same boat: their priorities are population safety and economy and travel is just not that important. In many countries test resources are precious and limited, and so they are primarily used for people who have a good reason to be tested: people with symptoms, front line workers, essential workers, etc. Again, travel is just "nice to have".
That's actually really bad for the airlines, so some of them are actively trying to help. Lufthansa, for example, has collaborated with testing company to do same day testing right in Frankfurt airport when you arrive.