Stay home... Rely on others in your household to go shopping for you... And remember to stay close to others in your household so they can get infected, and then infect others, and so on an so forth...
Isolating the sick makes sense... Isolating the sick with those who are healthy is insanity.
Lock downs kill.
How do you propose to separate the sick from the well in a household? You could put the sick in a giant quarantine center.
Or you could put the well in a hotel, except that there is a good chance they are already infected and will spread the disease.
Seriously, what is your proposal when one person is sick and the others aren’t? What practical steps would you take?