Since the Constitution gives Congress the right to regulate interstate commerce, it can pass any laws it wants for that purpose.

That's how the Constitution works: it is a framework within which government operates. It does not, in most cases, flesh out all the details. As long as what a governmental agency does fits within that framework, as a law to regulate a specific aspect of interstate commerce clearly does, the fact that a particular detail is not in the Constitution is not a problem. One would not expect to find details there, though in some cases (such as the requirement that the President be at least 35 years old) they are present.

If this discussion continues, I see this thread being sent to OMNI/PR rather quickly - so I will not bother to correct any more misunderstandings of how constitutional government is supposed to work, no matter how absurd they are.