You'd have to find the staff from somewhere, though, so either you drag a bunch of former nurses etc out of retirement, or you just change the way the NHS is overstretched.
Just for the record, I have plenty of sympathy with the idea that the current approach is wrong, overly fatalistic, pointless anyway, etc etc. What I don't have sympathy with is the flawed, misleading or just plain wrong statistics being thrown about to justify this argument. It is clear, or it should be clear, to everybody, that relaxing restrictions and "letting the virus run its course" is a euphemism for allowing a significant number of people to die sooner than they would have wished, and an even greater number of people to suffer from potentially severe long-term effects (lung damage, brain damage, other organ damage, etc). By suggesting that the death rate is "minimal", or that these aren't actually meaningful excess deaths (eg because Covid victims would probably have died within the next, say, two years anyway), people are being dishonest about what they are calling for, and that shouldn't be tolerated.
Perhaps, in the end, we will have no choice but to let that happen, because we've completely exhausted our patience, our other resources, etc etc. But I don't see that we are at the point of giving up yet. If some judge differently, then, fair enough, it's a judgement call, one I am glad to not have to make myself. But those who should have to be honest about the consequences of that decision.