It's not just TikTok, it's the entire modern day culture in general. Back when we were kids, the majority of our dreams of stardom started and ended at the cinemas because the idea of being famous or being an actress was so far fetched.
These days, there's this notion that 'anyone can go viral'. This has resulted in people posting non-stop about anything and everything, people filming everything because that video might get 100k/1M/etc views, people posting so many photos of themselves or their things because it's one way to flex/gain approval from a broad audience in real time.
The thing about social media is that yes, the stars they see on there are famous, but they're also relatable i.e. normal people. What this means is that kids/teens are increasingly posting things there thinking that they could be like one of the people they look up to. The only thing that could be done imo is for parents to teach their kids good internet practices and to help them develop a healthy sense of self esteem outside of the external validation.
You can ban TT but another will take its place. It's inevitable at this stage.