Well it's a matter of priorities isn't it, we can tell these people sorry we want to go about our lives or we can accept that we need to make some sacrifices to their benefit.
Herd immunity from a practical perspective obviously works (under the assumption of long term immunity) but it shifts burden onto the vulnerable which i just can't get in board with.
I know we're not generally great at helping the vulnerable so I'm hoping the goodwill hasn't been used up. It doesn't need a full lockdown forever but it might need one occasionally.
I read an article from the Guardian today about the rise in mental health related issues with a lot of people (often young men) who are previously "not known" to services now presenting with serious mental health issues. I read somewhere else that cancer diagnoses has reduced 80% and evidently that is down to reduced screening. These are some of the short term effects of lockdown. Longer term effects in developed countries come from a recession which will reduce life expectancy, often for the poorest. That all adds up to years lost.
If you start from the premise that lockdown a) will reduce the spread and reduce deaths but won't stop some people dying; and b) it cannot continue forever then it becomes evident that without a vaccine, a balance has to be found in the best interests of society. It's obviously a very tough balance to keep. The burden of a continued lock down and economic damage falls on the younger members of society. They are the people who need to work to fund essential services in the country, to pay the pensions of those retired and (increasingly) to fund care home fees for parents who live longer. As such, economic damage hits everyone in the long term. Of course, short term we must do what we can to protect our old and vulnerable too. Its hard to square these two issues.
The friend I referred to is older than me and I met him at work. He's a real family man, married very young and has three kids and now one grandchild. He has a job he likes, has never been hugely ambitious and is genuinely the most positive person I know. He is a role model because he's not the most wealthy but he genuinely loves his life. He cycles and runs, travels with his wife all over the world and once told me if he got to 70 and dropped dead, he'd take that if he could be healthy until that day. I like his take on life.
We mustn't forget that amongst crunching numbers and stats, people need to have a quality of life. That's what makes going to work bearable for the vast majority of the population. Those who have retired want to enjoy the 10 or 20 years they have left and I suspect those this is designed to protect are the ones who will get sick of it first.