Anyhow, now that the quarantine in China has clearly failed, what you suggest would serve mostly as symbolic gesture at this point, to make people feel that somebody somewhere is doing something.
The Chinese containment methods didn't fail. They came too late to stop it spreading outside the borders of China, but their containment methods definitely succeeded (at least for now) within China itself. There are now a lot more daily cases outside China than inside, and most, if not all, that
are occurring within China, are happening inside Hubei province where the outbreak started...
Hubei province the epicenter, is a place with roughly the same population as England, and this virus utterly overwhelmed the healthcare systems over there, just as it is now doing in Korea and elsewhere...
If you look at the disaster in Hubei, you can maybe imagine the scale of the calamity Britain could be facing, if like Hubei it fails or (more likely) has failed to act during a massive window of opportunity, and time to prepare for its onslaught.
Unlike Hubei, Britain and its leaders were blessed with weeks to prepare for this thing...
But I think its already too late now, it will probably soon blow up. Like you say its probably something the world is just going to have to get used to.
But a lot of peoples loved ones are going to die for the sake of a short term economic stability that they won't get anyway in all probability. I know its certainly not something I am willing to sacrifice my own loved ones for, and once it actually happens people will not be thinking like that any longer...
As in Hubei and Korea, its only when it actually starts to get serious/scary that governments start to react, and actually do something.
Until then, its just time they are probably squandering.