I think a lot of it is a mostly failed competitive aspect - they wanted to make it so players had to compete, which makes the game more exciting, but also motiv

I think a lot of it is a mostly failed competitive aspect - they wanted to make it so players had to compete, which makes the game more exciting, but also motivates cheaters and prevents those with limited play time from really succeeding. Not sure what the alternative would be though, a single player version would have been incredibly boring. Maybe some sort of co-op based multiplayer instead could be done, but I'm not sure what that would look like.