> based on, honestly, good evidence

Can't say I agree. Notice that the proposed legislation isn't specific to social media. Rather it's explicitly advanced in support of Colorado's data privacy laws as they apply to minors.

There's evidence of lots of different issues, a few age related but most not. Adults certainly aren't immune to adversarial algorithms and dark patterns and the practical need for privacy isn't limited to children. It's more that we only seem to be able to achieve broad consensus to add additional regulations where it concerns children.