[jfman]

Or how about we test people in the days before travel and conduct temperature checks before they get on/after they land and quarantine as appropriate?

You know, the stuff that's evidenced in science.

I'm sure someone will be along to say 'ah, but you can still miss one'.

Yes, however in the absence of a silver bullet/magic cure/'herd immunity" everything is about pushing risk down to as close to zero as possible. A point completely lost on some here.

If you think it's too hard or why bother then we might as well watch the world burn trundling along from lockdown to lockdown and see if that's cost effective.