@mincefuckinpies
There is a huge difference between your child having to SI, or having D and V, or a fever, or a viral infection that isn’t corona and needing to take time off, and an entire school closing. I am honestly surprised people can’t see this.
Sorry to surprise you but I can't see the difference in practical terms, aside from school closure only lasting 4 days and SI lasting 14 days, plus you get a day's notice for the school closure, which you don't if your child's bubble bursts.
SI is different from the other examples you gave (D&V, fever, other illness). If a child is actually unwell for any reason then of course they need to take time off, for the sake of their own health before any other considerations.
But most children who are home self isolating are not unwell. They need to take time off to prevent the spread of the virus and in areas of high transmission, many children have needed to do this repeatedly since September.
Please can you explain the 'huge difference' between a child who is not unwell having to SI and a child who is not in school because the school is shut? Both children are well, both are not in school for the sole purpose of preventing further infection.
I will be honestly surprised if you can explain this huge difference in a way that doesn't make closing schools look like the obvious best option.