The issue isn't whether individuals will get the virus or not, 80% probably will at some point. The issue is the capacity of the health service to deal with the numbers involved and the knock on effect of this. The predictions are that the number of critical cases requiring intensive care, if nothing is done, will completely outstrip the capacity of hospitals to deal with it )provide beds, staff etc.). On top of that, healthcare and other key workers will become infected, taking them out of the system and lowering its capacity even more. The scenario of bodies piled up and people dying in their thousands with healthcare staff having to take impossible decisions on who to save, is not one that any government, or society, can reasonably accept.
The current measures are drastic but necessary - remember, it's not about the individual in this case, it is about protecting society. There are measures the government can take to mitigate the damage and from what I can see, apart from the buffoon of a Prime Minister who has been caught out for the incompetent chancer he is, they are doing well given the circumstances and the bumbling vacillating leadership of their PM.
