I call out posts about anime that already have their own large FANDOM wikis where far more people care about the topic. This wiki’s Discussions are for anime that are under-represented anime and related topics.
We have no idea how they pick their tags, so it’s not so much a mistake as should be added. I noticed lots of anime on MAL where they put some tags and miss others.
Sometimes they have some strange ones based on the type of magazine the source manga shows up in... like O Maidens in your Savage Season is classified as shounen, even though I highly doubt most shounen watchers have seen it bcuz of that.