The process for making laws matters. In the USA, a law made by the Supreme Court is the whim of an individual. A law made by the President, or a department director, etc is also the whim of an individual.
I agree with chrisco255 that things this important need to be done right. Nobody can rely upon it until it is properly done.
We may differ on what constitutes a "law" here. I see a big difference between a law and a regulation.
Only Congress can make (federal) laws. Regulations are needed in order to functionally implement laws. If congress disagrees with a given regulation by pretty much anybody, they are perfectly able to make a law to nullify it.
I agree with chrisco255 that things this important need to be done right. Nobody can rely upon it until it is properly done.