Not going to happen because people are not going to follow it.
Seriously, even last year BJ didn’t actually follow his own rules and had people at Christmas. How can he expect people do it again now?
But more to the point, socially isolating people is the most awful thing to do to people. There are many other things to do first. Masks in school, masks everywhere indoors. Ventilations in all enclosed areas. HEPA filters. The list is long and can make a huge difference.
On thé other side, there has been many countries who have NEVER enforced that sort of rule (long meeting up with friends and family) even in the ferry first year if covid and … surprise … their death rate was still lower than here with all rules about not seeing people.
Start by paying people who needs to self isolate a decent income. And you’ll get many more people who stay at home when they are ill.
(In the long run, It would also have cost less money doing it right at the start when numbers were lower because it would have helped stop the spread of the virus…)