However, it's clear that the danger IS very severe for some people and that allowing it to run rampant through the country is not going to help those people
Allowing it to run rampant through the country isn't going to help anyone - we're not just stopping it doing that for the sake of people it will kill. We're doing it for the economy and society as a whole.
Having a low risk of death from the virus won't help the person who can't get treatment for another condition because the hospitals are full of covid patients, or the healthy young person who has lost their job because their employer can't open as no one wants their product while lots of people are ill (even if most will get better). It won't help the tourism or hospitality industries that depend on people wanting to go out and spend money. Only low rates of coronavirus circulating will help them.
Stopping the virus spreading freely has never just been about stopping vulnerable people from dying. It's always been about protecting all of us, and society as a whole.
We desperately need a way of keeping infection rates low without lockdown. Testing, tracking, everyone generally being careful - low post-lockdown starting rates of infection - we need things like that.
Individuals accepting a personal low risk to the extent that they no longer care whether or not they catch the virus will make things worse, not better. We need people to feel safer going out again, but the useful way we're going to do that is by persuading them that there's not much virus out there any more and that testing and tracking will find new clusters quickly. In other words, by all of us working really hard to reduce the chances of new infections - not by deciding that new infections don't really matter because our individual risk is low.