Yeah, it isn't really comparable to Facebook or Reddit or Youtube. They really do different things. TikTok seems most optimized for the passive receiver of vapid content use case. You can actually do exactly that with reddit if you browse without logging in and never click a comment thread. The top 1% (and bottom 1%) of interesting TikToks end up on Reddit anyway. Facebook/Insta are explicitly about your life and the lives of your acquaintances. TikTok seems more like competition for Netflix really.