People are so idealistic these days. They WANT things to be that just aren't. They WANT to believe that they can change human nature and that there are unicorns and 45 genders and homeless people wouldn't be homeless if someone gave them some money.
Without Marshal Law, you're not getting the lockdown quarantine you want. Period. It's just foolish to think so. Thankfully, we're not yet stupid enough to try Marshal Law. So that leaves "do what you can to get to herd immunity fast enough" option.
Yes it will likely overwhelm the system and people will die and many more will be sick for a while.
But this is a war. People die fighting wars. We do what we can but we know it's just gonna suck. But you try to win the war as quickly as possible, while saving as many as you can, and return to normal as quickly as possible.
That's all we can do. You cannot "lay siege" to a virus. You can't starve it out and you can't wait it out. You can only use its weakness against it - it only gets one shot at you (and it's a really, really bad shot). If it misses you (and it will miss almost all of us) it can't hurt you again. Eventually it takes its shot against most of us and quits. Victory is already ours, and we know it. But we refuse to accept the terms.
Instead we are trying a scorched-earth retreat into the hills strategy, salting the earth as we run away, leaving us nothing to come back to when we "defeat it." But at what cost if there's nothing to come back to?
The greatest argument ever made against democracy is a 5 minute conversation with the average voter.