Why are Vocal Lyric found loops under Sound Effects in Apple Loops

Was About to explore what Vocal lyrics are available in Apple Loops of Logic Pro when I realised that a lot are duplicated in Sound Effects filter as well as Vocals filter.

Also, some vocals Lyrics are only in Sound Effects.

Why aren't Vocal Lyric loops filed only under Vocals? After all, they are not what I would consider to be Sound Effects.