The other thing TikTok does well is that it removes choice. On YouTube you look at a dozen videos and think "Do I want to watch any of these, or look at another dozen recommendations?" It's kind of similar to picking something on Netflix. With TikTok you can just mindlessly "Next, next, next".
I am not one to get hooked on social media, but I found myself wasting time so easily on TikTok I had to delete it from my phone.