If #2 os true, then why don’t any of the other similar app or features of other apps work as well as TikTok from a technical standpoint? My experience with TikT

If #2 os true, then why don’t any of the other similar app or features of other apps work as well as TikTok from a technical standpoint? My experience with TikTok is that purely from an execution standpoint of showing a video, being able to manipulate it (scrub through, alter speed, show/hide comments, etc), and then show another video immediately, no other applications - or the similar features of Instagram and YouTube - come close. Not to mention how successful the TikTok shop is.