But they aren't. They are live service games that are constantly getting updates and new content. They are "Complete" in the sense that you can play them, and live service games fall under a weird area where they are "finished" in the sense that they have active communities and are wildly considered released but they aren't "done" in the sense that they are always evolving, changing, and adding content.

That is why most of those games listed will have the "live service" tag. This isn't really a website for figuring out if live service games are complete. Its more for determining if a singleplayer game you are interested in has released every post launch dlc.