Big tech already knows more about kids than parents do.(1) If they want to protect kids on their platforms we don't even need to talk about end-to-end encryption yet. What would help is big tech sharing daily summaries of child on-device activity with parents. There are lots of parental control apps that do this, and yet they have had to fight Apple for permission to operate.(2) Parents don't want their kids abused either. We can definitely find a win-win situation here if we work at it.

References: (1) https://www.forbes.com/sites/kashmirhill/2012/02/16/how-targ... (2) https://www.kaspersky.com/blog/apple-fas-complaint/26017/