Earlier quoted context omitted.
I've not been able to find medical evidence that the vaccine has any benefits at all for under 5s. It's been theorised to reduce severe illness and death (and it's very plausible it might!) but afaict that's never actually been measured.
Vaccines are not only supposed to benefit the recipient. Vaccination is a public health program . If vaccinating under fives reduces the risk to preschool carers and enables us to maintain higher preschool capacity then that's a public benefit that has nothing. to do with whether it affects the individual outcomes of five year olds who contract covid.
> If vaccinating under fives reduces the risk to preschool carers and enables us to maintain higher preschool capacity
I agree, but this is also not known.
Any broader public health benefits are theoretical at this point. They don't seem to have been measured or even modelled.