I agree with you that nothing has been proven either way. But I would say that, because people hate social media so much, we should perhaps be a little skeptical of claims that it causes harms. It's very easy to believe "X thing I hate" causes harm, even when the evidence is not solid.

> So since I can't wait another century for their to finally be good science about social media, I have no choice but to go with my gut.

Doing nothing seems fine!