You think it is wiser to wait until a variant starts putting children at greater risk?
Coronaviruses have been been mutating since before humans even existed. Yet none of the variants—ever—have proven to be particularly harmful to remotely healthy children. Why would we expect this one to evolve in that direction?
There’s a reason we never went into full scale vaccinations for coronaviruses prior to this. It mutates too fast. And it generally isn’t that dangerous. Sure, this one is dangerous to a very small percentage of the population (NOT children) but I’m not convinced that after thousands upon thousands of years of living with mutating coronaviruses unvaccinated children will all of a sudden become ground zero for some doomsday coronavirus variant.