TV, video games, rock and roll music, nor dungeon and dragons were specifically designed for compulsory use, reduced the users' ability to focus, or exposed them to the kind (or sheer quantity) of harmful material that TikTok does.
TV, video games and rock and roll music is just as ubiquitous as TikTok. All of these things are on the same mobile device. They are also designed for compulsory use and can expose them to harmful material as well. Nobody writes a song you only want to listen to once or a game you only play for 10 minutes then never again.
This type of hyper fixation on TikTok is pop science and self soothing. It springs from the generational anxiety that the kids are not okay and something must be wrong with them. TikTok can be that boogey man for boomers, gen x and millennials. Same as older generations felt about TV, video games, rock and roll music, and D&D.
You could get reprieve.
With TikTok on mobile, it's ubiquitous.