It matters because when you research the game to see if you want to play it and you see "level 120" it can put you off. 120 implies it will take a lot of time. The story already has that effect, but a lot of people don't understand just how long the story actually is until they are a quarter of the way in and still nowhere near the end. If they see a number like that, they may not even try the story in the first place.