I am 100% pro-vax and will almost certainly get both of my <12 children shots as soon as they're eligible.
That said, I'm really not sure about the bolded. I was super skeptical of the return to in-person schooling last fall, but over time I became convinced that schools were not a major vector of transmission. Now it certainly is possible that delta is a game changer in terms of pediatric transmissibility, but at a minimum we can't say that with certainty, and based on what I've heard so far I'm skeptical.
I am worried that schools seem to be abandoning any attempt to enforce masking. I want my kids masked at school until they get their shots.