If you need to use an outfield player to distribute then it negates the man advantage that comes from a keeper who can play out. Basically defeats the object and indicates a complete lack of tactical understanding as to why they play this way
Quite simple really. Keeper effectively becomes a sweeper in possession to create a numerical advantage. If you ask an outfield player to do that and the keeper is just a shot stopper then it nullifies the whole purpose of doing so. Don't see why you'd need badges to understand it.
