"it's a trade off some folks would consider."
I imagine he's talking about this article:
https://www.thelancet.com/journals/lanchi/article/PIIS2352-4642(20)30105-X/fulltext
I know a lot of parents who are exhausted by their kids now, but they wouldn't like that tradeoff of a 1 in 25-50 students, teachers, parents, and volunteers dying.
I think you might be interpreting those numbers incorrectly.