Depends what you mean.
If you think it's "clear cut" that we should try to shelter the vulnurable and otherwise open up the country back to how it was and just let the majority of the population catch it, then I disagree.
Quite honestly, and if we had the benefit and hindsight, yes I very would much propose a lot less of a cautious approach and concentrate resources to those who would need it most, not simply locking them up along with everyone else which is effectively what we did. Its painfully clear that a lot of problems stemmed from us trying eradicate it through lockdown, instead of managing by getting the right treatment to the right people.
Well, the ideal is a vaccine or effective treatment. But otherwise some sort of measures will have to stay in place - or we hit it now and we hit it hard, and we secure our borders against it.
Absent the first of those, the latter is my preference. Several countries have proven it possible.
<looks to the horizon for the fleeing horse before slowing closing the stable door>
So, even if we had closed the borders as soon as we knew about it, do you actually believe that this would have stopped it? Because its very widely speculated it that it had long escaped the Chinese borders long before 31/12/19, indeed it is believed to have been right here in my home town by then, perhaps even swimming around inside of me by that point. Even your poster child New Zealand couldn't snap their borders closed quickly enough, and the virus is still brimming under the surface there.
And all of this comes with the added problem of how when you've closed your borders do you reopen them, New Zealand have this dilemma already. Now I know what you might be dreaming about, a few years where everyone that previously went abroad could instead stay in some B&B on the coast, or in a tent in a rainy field in the Lakes. However what you are blissfully ignoring is that we simply don't have the capacity to replace all that. According to statistics Brits made some 72.6 million trips abroad in 2019. Now transpose those to some of your favourite destinations. If you think the scenes from Bournemouth recently were shocking, imagine many times more ramming onto the beaches, forming queues on the roads, pushing up the cost around the country. Probably at this point you might go onto suggest less travel in the UK as a result, so long of course that Bletchley to Cumbria was still an open path....
Continue as we are - opening up the country cautiously, doing what we can to make sure exponential growth doesn't start again.
In hindsight it might turn out to have been the wrong thing.
But I don't think it's obvious now.
I don't buy the idea that we can 1) divide the whole country into "safe to catch it" and "not safe" and 2) isolate the "not safe" people so completely that they can carry on in safety while we let coronavirus go through the rest of the population without constraints, nor that we can have much confidence that the health system would cope if we did.
Remember the phrase "flatten the curve"? Yes, that was the original strategy, to slow but not necessarily stop the spread until capacity was available. And that capacity was never fully, or even partially used. That was the first "just in case" measure, and we've been flipping between such ever since. However as you may have noticed today, the mood in the country is just starting to shift. This might be the first indication that people are starting to grow weary of measure after measure, "just in case". And if that grabs hold, opinion will shift rapidly. I'm afraid once again trying to tip-toe towards a solution, whilst taking one step forward and two back isn't going to cut it much longer. The solution has to look to protecting those that need it whilst not curtailing those that do not so much.