Honestly, it’s only because people feel that “essential” services will be available to them that they can insist that schools be closed and their children be kept at home.
But if you’re going to close schools then it has to be all or nothing, thus risking the nhs/police/fire services/utility companies be short staffed and in some instances unavailable.
If schools close then so should nurseries, work childcare facilities, anywhere where there are groups of children.
How keen are people going to be on all schools closing when they have to live through power cuts, water shortages, lack of NHS care, no supermarkets?
People are very much taking the approach that it’ll be fine because they’ll get supermarket deliveries, (which they won’t because either the delivery drivers won’t be available or there will be fuel shortages,) they can play games/watch television (but the internet will be down and besides, you might not have electricity).
This is of course worst case scenario, but this is what it could come to if people insist all schools close as this could have a knock-on effect which is far worse than the coronavirus