I don't think it's a separate issue. Use mitigations to buy time in order to vaccinate everybody, then continue with necessary mitigations and testing/supported isolation to drive the numbers down to the level where infection is not an inevitability. It's only inevitable here because the disease is being allowed to spread almost unhindered.
What's not sustainable is the current strategy, we are going to end up with a variant with much greater vaccine escape, and then we'll be back where we were in the previous waves.
What's not sustainable is the current strategy, we are going to end up with a variant with much greater vaccine escape, and then we'll be back where we were in the previous waves.