This is like rhetorically asking, "Are you saying that doom and marylin manson aren't harmful to children?"

The problem with social media isn't the inherent mixing of children and technology, as if web browsers and phones have some action-at-a-distance force that undermines society; it's the 20 years or so they spent weaponizing their products into an infinite Skinner box. Duck walk Zuckerburg.

This is all assuming good faith interest in "the children," which we cannot assume when what government will gain from this is a total, global surveillance state.

Last time I checked there's no scientific consensus if social media causes harm at all. The best studies found null or very small effects. So yeah, I am skeptical it is harmful.