But if you're talking about infecting a large part of the population deliberately then it seems to me you should try to do it as quickly as possible because isolating the vulnerable part of society from the rest is not a sustainable situation.
And well, if we're talking about infecting a large part of society anyway then health and human lives are apparently already expendable to some extent.
Which is why the “Lock down hard to flatten the curve” thing never really made sense to me. If you prevent all transmission you’ll just drag out the pain. I thought cases are just going to shoot back up when you open so what’s the point?
(Turns out I was wrong though. Delaying cases was very valuable. People getting sick now are much more likely to survive.)
Unless of course you're worried about the side effect of making a large number of people seriously ill, but if you don't see a way of doing it without causing a ridiculous number of people to fall ill then perhaps it isn't the best choice?