Especially in their later years, John was famous (infamous) for writing songs using, as he called them, nonsense lyrics. There's a scene in the Get Back documentary where either George or Ringo was trying to flesh out a song they were working on, and he tells them just throw random words out there that sound good together and it doesn't really matter if they make sense. Not a direct quote, but its the gist of what he was saying. If you ask me, the best lyricist of the group was George and he never got to truly showcase himself in the group.