"Addressing" that law, strictly speaking, means suing God for creating mankind with limited brains. There is little to do here, except to be aware of the difficulty of assessing the security of a security system: namely, that you cannot assess the security of your own creation. One way to say it is the following: if you cannot break your own system, then you are not demonstrating that it cannot be broken, only that you do not know how to break it. Which is not what you want: the goal is to have a system that potential attackers do not know how to break.
So the normal guideline is to never design your own cryptographic algorithm or protocol. A trained cryptographer can amend that into: "I can design my own algorithm variant but only if I can positively prove that I am not adding any extra weakness". Not being able to exhibit such a weakness is not a proof of absence of any weakness.