It really is if you look at part I highlightedIt really isn't. Just ban gatherings of, say 50+ people until we have more reliable data. Most businesses could get back to work at some level of capacity.
A 150 cover restaurant cant make money if it's only a third full on a FRI/ SAT night
A large 300 seater pub will not make money on 50 people on a sat night and the Government will not be able to enforce restictions on numbers