34.2 million people in the US are estimated have diabetes and you're proposing housing all of them (and a bunch of other people) in isolation for a year or two while everyone else goes about their business.
That's a lot of housing to find somewhere, food to provide, etc. Now try to do it in, say, six months.
At it's peak, unemployment from COVID shutdowns in the US looks like they were around 20-30M last summer. So in terms of making sure those people still have income, the number of people isn't too dissimilar, but that number has declined and we also didn't have to find new, isolated, housing, food, and other services for that group.
It's also a lot of people suddenly pulled out of their existing jobs and out of the regular in-person retail market, which means you're still not going to avoid some of the shocks we're seeing anyway.
This seems wildly expensive and impractical. Who's going to take care of all those people? Where are you going to house them (many of them live with people without those conditions)? Do you know how many people have diabetes, just to grab the first item off your list?