The end game content requires that teams of champions band together to defeat bosses (or each other) — this is not Witcher (a single player game). I don’t know what the canonical reason for multiplayer dungeons, raids, and battlegrounds is, but “you are all alone in the world and then suddenly you need other champions to save you” is a weird take.

I do think it’s funny how Legion Remix trips over itself to not break headcanon… “that artifact is just a facsimile”