Social distancing will stop when schools are open. Not from teachers, but just people.
I think as parents it is easy for us to forget that many people aren’t, and that there are degrees of social distancing. If WFH is maintained as a fairly strong policy measure it reduces a huge amount of causal contact, especially on public transport. Large gatherings, restaurants, cinemas, pubs - all places where more casual contact takes place and contact tracing much more difficult.
As someone said, a school is a more closed and stable population where contact tracing would be infinitely easier.
The other assumption people appear to be making on this thread is that children are ‘germ-ridden’ super spreaders of COVID-19 as they are with influenza, rather than much more marginal as with SARS and MERS. There is no evidence base for this. (There isn’t much of an evidence base at all but it’s worth challenging when people state this as fact.
Most expert comment I’ve seen is around the fact that they have no idea yet why and how this plays out in children - what’s the ratio of them not getting it vs being asymptomatic (ie it a different ratio than in adults); what is the relative R0 of an asymptomatic child, why do they tend to have it so mildly when they do get it, etc etc.