what do you think tiktok is? I'll give you examples:
me - I use it rarely, 2 times a week maybe I'll open it and what I see is car related content, car memes etc, pranks etc. Good way to kill some time when you're waiting for something etc.
my brother - he's into his 3d work, dyi etc all he sees is dyi videos, 3d animations, how-tos etc
my other half - loves crafts and kawaii culture, so she sees a lot of cute plushies, a lot of crafting videos, japan videos etc.
tiktok isn't just 14 yo's dancing to trendy music, tiktok is like youtube, you get videos suggested depending on your likes/hobbies.
With a limited video time, it sounds like an influencer's dream - they only have to spout for a short time as real information isn't going to fit. The issue with YT is that you can't make money.. almost like YT want it to close down.