I feel like the actual danger is too much of a single kind of stimulation. So if you ONLY sit around and read books, literally never go outside, never take a walk, never go out with friends, stop working... Is your contention that people were wrong to warn against doing that?

Now, have you seen how some people consume TikTok? They will literally do almost precisely what I've described above. Just sit and stare and scroll for hours. Neglect other life activities.

If you scroll TT for an hour per day, you're never going to experience negative effects from it. If you scroll it for 14 hours a day, you will probably become a vegetable. Find a happy medium (for me it's 0 hours per day but everyone is different), eat, go outside sometimes, spend time with real life people, go to work or school, etc.