My take on it is that you can do the lock down thing now, and it may have an impact in the short-term, but it isn't sustainable in the longer-term, which is what is needed because the virus won't go away until a vaccine is found. There isn't really an outcome where people won't die from this, unfortunately.
I think the problem with that though is a presumption, that after flattening the initial curve that some measures wont remain in place and things will get back to normal, that is not going to happen. Like it or not there are going to restrictions on liberty in place everywhere in the world for the next year. Foreign travel will be out, social restrictions on managing a first and second wave can be fluid. People in or out of countries wont be welcomed on either side of that equation. Limits can be implemented and freed up at anytime and reintroduced in the public good. As a strategy you can incrementally increase and decrease the curve based on civil and social partnership for the greater good. Spirit of the blitz mentality etc.
Lockdown is a general term used, Ireland have restrictions in place but i can still go to work, head out for a run and a cycle, go to the the supermarket etc, the DIY store. The biggest inconvenience is sport, domestically and football in the UK, bars and restaurants and travel being cancelled - is it worth it to save lives definitely, its a no brainier of a decision.
Everything everyone is doing, isnt about curing this virus its about delaying and saving lives. Its like if an alien invasion happened and they start bllowing us away do you try and avoid them, or run out with a saucepan and try and fight them off. Simple psychology fight or flight.
I think yesterday was a bit of acknowledgement by the UK that maybe the faith in the herd approach may not be as cast iron as it was a couple of days ago, there seems to be a hybrid approach now of beginning to introduce with some restrictions and keeping faith with the herd approach for political collateral. Its very hard to know how things are clinically in the UK at the moment, deaths are creeping up, testing just isnt happening, data seems so inaccurate due to restrictions and volumes of testing. As you will know, the herd theory is just that, its usually been backed by vaccination where its been successful, currently there is no definite if 60% of the Uk get it, recover, that they will be immune, they could all get it get it again in the winter, but that could be after a significant loss of life. Its ultimately a bet.
I suppose what i am getting at is the tolerance of the approach adopted by the UK and how easy it seems to be to accept that death is inevitable. It is, but the scales of that might just be mitigated based on an approach, there is something that just doesn't sit well from a humanity point of view, in being complicit with an approach of acceptable deaths before safety restrictions are put in place to minimize the loss of life.