From what I can gather, the thing that's actually notable here is the implementation gap. Yes, the legislation passed in 2024 and it's real - platforms have to do age verification - but the practical enforcement is messier than the law makes it sound. We're now in 2026 and most of the major platforms have introduced some form of age checking, though it ranges from pretty basic (upload ID) to stuff that's honestly not that reliable. The government basically outsourced the problem to tech companies and said "your responsibility now," which means there's no unified standard across different apps.
What makes the whole thing confusing, like you said, is exactly what you picked up on. The government was basically saying "we're not 100% sure this causes harm, but we're doing it anyway because risks exist." That's not necessarily wrong reasoning - plenty of policies happen on precaution rather than definitive proof - but they weren't transparent about that being their actual logic. They framed it as though the science was clearer than they themselves admitted it was. It's one of those situations where the policy might be defensible but the messaging was backwards.
The other complication is that the ban doesn't actually stop determined teenagers. VPNs, fake accounts, borrowing older siblings' devices - all of that still works. So it's more of a friction-creation policy than an actual ban in practice. Whether that friction does anything meaningful for well-being is still kind of up in the air, which brings you right back to the original confusion about why they pushed so hard without clearer evidence.