I think a lot of people are making the mistake of believing that just because Tik Tok isn't any worse than Facebook or Instagram, then it isn't bad at all.
They're all bad for a number of reasons.
More relevant to the article, is it a net good or net bad? It's easy to make a claim motor vehicles are dangerous and bad, as motor accidents kill over a million people per year. It is much more difficult to justify the counter argument that "the benefits of cars bring much more value to the world than the harm caused by the million deaths per year".
The author of this article states that tiktok brings him and the content creators enjoyment and in some cases livelihood. If the net societal harm of social media outweighs the net good, maybe we should get rid of it entirely.
But if the net good outweighs, perhaps it makes more sense to treat it like cars - enact regulations, restrictions, and safety measures, rather than trying to eliminate it completely.