No one will post a good argument here to carrying without a round in the chamber because such an argument does not exist. A gun without a round in the chamber is useless until a round can be put in the chamber. Time is precious and there will never be enough in instances where a weapon will be needed. Additionally, you are shorting yourself a round if not carrying in the chamber.
Time is of the essence if you need to defend yourself or your love ones don't give the bad guy that time.
Wingate