I think we don't want mandatory age verification or banned encryption for everything. However, you can't hide behind "it's not the law" as a shield for everything. Thanks to ubiquitous spyware, Meta knows damn well the age of almost all of its users, and if someone who's 40 is sending first-contact messages to 10 unknown 13-year-olds every day, it seems important to know what those messages say. They know this stuff is happening and they care about not being liable, not about your security.

We can assume Meta has backdoored its E2EE somehow anyway.