Mhm agree and that's what nostr:npub1wnanaunumzv96ll0cm5569uzjqn474yj24a559n2h8x3gk9d40rsjxl20f 's Animestr aims to achieve. It's at https://animestr.xyz/ if you're interested. In early alpha stage.

However I would prefer the bridge approach over a remake of Anilist/MAL as those platforms do a great job in keeping up with new releases and they already has a huge database of media metadata. And it integrates nicely with MALsync browser extension.

Rebuilding all that is too much imo.