Indeed, it's not a good position to see Israel in. But we shouldn't just ignore it and cross our fingers, we should think about how to avoid a spike in hospitalisation and death here which would end up with restrictions back. We're only 1-2 doublings away from a very significant health service impact.
First, we absolutely need to get as many people as possible vaccinated. We're not even trying, with still no rollout in 12-15yos.
There's not much point in general restrictions to protect people once we have as many people as possible vaxxed as it's just delaying the inevitable then. But we do need to keep infection below levels which cause a significant societal impact - health service primarily.
So second, I think we should consider measures to dampen spikes if and when they occur. I'm no expert, but that could include things like ventilation and air filtration systems in closed spaces (schools, nightclubs, offices...), masking where crowding is inevitable (public transport) and other things like that. This has been pushed for by some of the scientific community for a long time now, but I don't see any evidence of govt action on it.
And third, we need to see if delta specific vaccines can help improve efficacy, particularly against onward transmission.
Even in Israel, all the evidence is that without vaccines, it would be far worse. Perhaps 10x worse on deaths.