Great, if your symptoms are as black and white as that. Realistically, it seems we're facing contagious people who don't have such pronounced symptoms. there's be people going, "oh, no temperature, and my cough is mild. It's not Covid19 - I'll go see Granny." The science to date shows massive shedding in the first stages of infection, often before symptoms are manifest, in contrast to other disease that are most infectious during the symptoms. Also, infectiousness tends to drop rapidly, so five days after symptoms you're not infectious. 14 days quarantine from the moment you have symptoms doesn't match the typical pattern based on the current science, AFAICS. It's a case of closing the door after the horse has bolted. Without a way to test before symptoms, the thing can't be contained, and so the only way to really stop the spread is every hole up.
I feel at this point, regardless what the government suggests, people are more wanting to hide at home for a month until it's all over! Which would actually work, and probably be more organised overall than this half-way confusion we've got going on.