As long as there is an more or less even spread of new cases, closing borders accomplishes exactly nothing.
The issue is whether a decision was made that closing borders - actually, imposing quarantines on those crossing borders - is acceptable or not.
Any country that deems that unacceptable automatically makes a policy decision of not attempting the strategy of extinguishing the virus. Because if they did extinguish the virus soon someone would bring it in again. Therefore they consider it pointless to even attempt to extinguish the virus and necessary must fall back on the "manage the virus" policy.
What I am trying to point out is that this logic is unsound. It's wrong and damaging. The policy of extinguishing the virus and afterwards carefully dropping quarantines with other countries that embrace the same policy is a better one. Controls on borders meant constant
vigilance just in some places are way less damaging that
eternal vigilance always and everywhere. It's foolhardy to depend on a vaccine being done anytime soon.
People - most governments! - desperately holding on to an illusion of getting back to normal are preventing us all from going back to almost normal, rejecting a priori the only viable strategy currently that allows for that.
I don't think you're yet explained your point clearly. What do you defend as a policy?
I'm essentially pessimistic on the possibility of avoiding social breakup by carrying on as we are: case are likely to rise as we go into the autumn, new lockdowns will happen, patience will be stretched thin in several ways.
Obviously it's also impossible to let the virus run rampart: even where governments didn't care, people do!
The only chance of dealing to this and finding a stable situation is to get rid of the virus. If it can't be done worldwide then it must be done regionally. That has been
proven to be possible. Then keeping it out still requires some vigilance, some changes, but far less than "managing" the virus.
You don't simply manage a damaging fire: you extinguish it where possible. And you don't ignore it and say "there's fuel around, no point in putting it out because it'd just burn some other day". Might as well kill yourself claiming that life is not stable, only death is! That's a pointless defeatist and absurd attitude. But that's what many governments are doing now... it's people who first erred, and now will be afraid to admit they made a mistake.
Nothing like a crisis to show how badly government most of the world is. It's failing under a combination of unchallenged wishful thinking (conformity among the elites...), technical incompetence, and bad social organization (no room for leadership because nothing new can be attempted).
If it hadn't hit china first and let them set the example of locking down and quarantining, I wonder what the "leaders" who govern countries would have done. Do their best impersonation of the proverbial ostriches is my guess.