It really annoys me when they say that school closures alone would only reduce by a certain percentage. How many large and serious pandemics have we had where they closed only the schools and did no other measures? I'm guessing pretty much zero.
The model presumes that children have twice the contacts of an average spreader whilst at school. I think this is very low. They also presume that if schools are closed they will have twenty five percent more contacts outside the school setting - so not a lockdown situation at all.
And it's a model, so not grounded in any empirical evidence at all. Bit too much of that going on, if you ask me.
Why don't we just use the fact that we are behind other countries, see what they do, see how it works, and copy the ones that seem to match our general situation and have good results. Or is that too basic and simple?