This is obviously true in a trivial sense. You don't want people stealing from your house, so you lock the door and have to carry keys, and get locked out if y

This is obviously true in a trivial sense. You don't want people stealing from your house, so you lock the door and have to carry keys, and get locked out if you forget them. The need for security creates a set of additional requirements that have to be fulfilled. If you didn't have to fulfil them, things would indeed be more convenient. This is also true of requirements in general, not specific to security. If you don't need them, things can be simpler and more convenient.