The links I posted explain "what this would achieve" in some detail
I think you’ve perhaps misread me, then. My point is: what would slowing transmissions achieve, exactly, for a very common endemic virus in a post-vaccine world? Almost would still be exposed to the virus, repeatedly, as we are with the other common human coronaviruses. Slowing transmission to buy time for vaccination or to lighten intense hospital load makes sense. Slowing transmission so your first infection happens in May rather than April achieves… what?
As for what The Experts say: I feel that when real-world conditions don’t support a papers conclusions, the paper is more likely to be missing something than the world is. Even if it’s that something which works in a subset of a population doesn’t work in a whole population, for example. Continuing to claim that masks do reduce community transmission when we’re living in a country where they clearly haven’t sounds a bit “well it works in theory, so it doesn’t matter if it works in practice.”
the strawman suggesting I want masks forever.
If you don’t want masks forever then you, like me, accept that there is some point at which masks shouldn’t be required (by law or social convention) while coronavirus is still circulating. You might have different criteria than mine for when it’s reasonable to lift that expectation, but then it’s a matter of degree, surely - far from a different ideological stance.
I don’t think many people explicitly want masks forever. But, there are a number of people who want masks “just for now, not forever” but can’t or won’t set out the milestone they think we’d need to pass in order to get to a point of no masks. And if ‘largely everyone who wants it has been vaccinated and hospitals aren’t in danger of being overwhelmed’ isn’t enough, you do start to wonder what would be.
(I suspect for many people it’s more subjective - “when I feel like they aren’t really warranted any more, but I don’t yet know what combination of things will make me feel that way.” Which is fine for someone’s own personal approach, but is not really very convincing when it comes to something they think others should be expected to do.)