But why not both? I'm coming from a USian perspective here where I don't see much possibility of actual widespread bans of these types of products, rather just a retrenching to what can be supported by regulatory capture.

Also, we're getting the locked down computing devices anyway - mobile phones as they are right now are a sufficient root of trust for parental purposes. So it seems pointless to avoid using that capability (which corpos are happy to continue embracing regardless) but instead put an additional system of control front and center.