I don't know, strikes me as not being that unreasonable at all.
Transmission rates and the like are a statistical problem; and strikes me that given this is a statistical problem you could reasonably model how many unquarentined travellers you can allow without significantly harming transmissions.
Now, say your models say that you can let, say 50,000 people travel without quarentine and not have too negative effect on transmission rates; with a business brain on (that's what this forum is supposed to be about) do you have 50,000 select tourists go and fritter some money outside the country, or let some significant businesses that can potentially bring large economic benefit do some unencumbered travelling instead, and reap the benefit from that?
Of course, the difficulty is that the plebs don't understand anything that isn't spoonfed to them by the rag of the day, so it makes for a tough sell when outrage is much cheaper and sells more copy.