*I don't understand what people are missing.
Lots and lots of people are going to die. Most of us on this thread will lose someone we love.
Yes, it may be unworkable. Your loved one probably won't survive. I don't know how to make that any clearer. You need to start preparing yourself for it.*
People die all the time. In the past two years I've lost my dad and both my grandmothers. At some point in the fairly near future we'll probably lose my mum and my inlaws plus assorted aunts & uncles. I've lost friends (car accidents, drowning, cancer etc). The only certainty in my own life is that it will end at some point, maybe tomorrow, maybe a few years down the line, maybe I'll even last to 98 like my Grandmother did.
Not all of us have the same attitude towards death. I think the British attitude in general is fairly unhealthy when it comes to it and perhaps that needs to change as well.
That however doesn't change my feelings that 4 months isolation is unworkable for a number of reasons. It's not the mechanics of it, food etc is easy to organise assuming the country hasn't run out...it's the human contact side especially for those who are widowed/alone.