I am in S Wales and we have what are essentially tier three restrictions in place - no mixing of households in any indoor setting, can't leave our area.
It is hard, it really is. But as a pp said, what would happen if we had no restrictions and the infection rate starts to run out of control? Yes most people will survive, but it's what happens when you have thousands and thousands of people infected at the same time in a particular area and unable to go to work because they are too ill or because they are having to self-isolate .
Remember the panic buying - what would happen if lots of shops in an area had to shut because of lack of staff, no deliveries available, no click and collect. There would be chaos.
Added to that, if infection rates were high, no-one would go out unless they had to. People wouldn’t be flocking to the pubs etc. That would fuck the economy too.
We have to be realistic, whatever path we take is going to be hard and cause suffering and damage to the economy. The fact that governments all over the world are following similar courses of action suggests that this is the least worst option. But if anyone can set out a better option, I would love to know what that is!