I think it's different for tiktok (as a non-tiktok user so take this with a huge grain of salt lmao), people don't watch one creator's videos one after the other, they get put in the big soup of clips that people scroll through for sometimes hours a day. And a lot of that is people sticking to one formula, because for many, the predictability is comforting / puts them in the tiktok brain off frame of mind.

Which isn't a new phenomenon - lots of people have "comfort shows" on e.g. Netflix, often the studio series with long seasons like sitcoms. They're comfortable because they often maintain a similar energy or formula over their run time, and missing parts of it (like current-day episodic films) isn't a big issue.