My point about vaccination for chickenpox is not about if it's right or wrong to vaccinate, but the NICE people have published their evidence, demonstrated the trade-offs in terms of cost, QALY's, risk and chosen a particularly policy (vaccinating at risk only) I can't really comment either way, but I will likely be vaccinating my DD shortly (well likely after an antibody test as she may simply have had a case without noticing) but that's only now at her relatively older age.
But it's about lots of evidence and decision making on a disease that is it seems a higher risk in children than covid, so I'm not convinced that the opposite conclusion would be drawn. ie it's not self evident that vaccinating kids at the moment is so obvious it should be done - unlike vaccinating 80 year olds, I can buy that is so self evident I didn't mind that the data wasn't published.
I still think we need QALYs for other measures - I'm not convinced on the whole range of lockdown measures (shielding isolation, the closure of parks, limited outdoor exercise etc. being the ones that I really suspect harmed more than the helped) but it's more understandable that lack of knowledge and rushing was done for those, but there's plenty of time to produce the evidence for the kids.