I know SwSh's story is poorly written, but the worst of it has to be that there is literally no reason to fight this man when we do. Eternatus has already been awakened and Leon is currently battling it attempting to capture it. It's not like the player is going to stop Leon, and with his goal already accomplished, why do we battle him? What is he stopping us from doing? What are we stopping him from doing that hasn't all ready been done?