For 90% of countries that was never an option anyway and for most of the rest that ship has long sailed.
The countries that have tried, like Israel, have seen so much success with that strategy they are now in their third lockdown. And that’s with the best vaccination numbers of the world.
That's for Jewish residents. Apartheid states direct all benefits to the favored class. That works, until pandemic time. Palestinians are human too, and since they haven't been vaccinated at all they are a persistent source of covid.
My observation has been that in Canada and the UK any sort of selective or regional restrictions have been extremely ineffective and they offer evidence to people who would like to make bad-faith arguments about the power of restrictions.
My opinion is that two things appear to work to get you manageable levels of COVID-19. The first is broad restrictive measures over very large geographical areas that actually reduce time indoors with other people and compel mask use (some of the Canadian provinces did this well). The second is simply letting the epidemic reach levels that scare people into changing their behaviour (many US states).
There's no great mystery here. The virus primarily spreads in indoor settings where people breath the same air. A lockdown is only effective to the extent that it stops people from getting into those situations. Closing pubs will reduce transmission a bit, but not nearly as much as telling everyone to stay home.