For a TikTok user who wants to preserve their content it may make sense. Cross posted TikTok videos often lack context and therefore aren’t as interesting, due to the way TikTok content is often times built on trending sounds and videos made by other users. Nostr doesn’t replicate that environment. 

 That’s a damn niche subset of TikTok power user. Keeping in mind a 17 year old girl posting dances doesn’t give a shit.