Ah yes, the old “the children aren’t safe until nobody has privacy” logic.
With that logic we should put cameras inside every home so we can watch for child abuse. Record the way parents talk to their kids at all times. Random house raids so we can potentially find abusive materials. Phone access at all times.
It never ends once you start pulling on that thread. We will always have bad people and suffering. I don’t think that means we should give up any and all privacy. Refusing E2EE is just another one of those thought lines.