By denying educational credentials,
you mean a licensing issue?
Educational credentials are not governed by the department of education now.
Education credentials varied even within the state of Texas from institution to institution, Until the state board of education standardized those credentials, and still do it to this day. It happened right before I went to college.
Department of Education does not handle that.
Let a small D of Ed make minimal standards" goes to "MAKE ALL STATE LAWS THE SAME"
weak.
You gave a basis for wanting to require a federal minimum standard. That basis was so that people could move from state to state, And be shielded from varying standards.
If the objective is to shield people from varying standard some on stage so that they can easily move to another state, wouldn't that same logic also apply to state laws? There are varying standards among states on variety of issues.
What you end up with is a complete destruction of the sovereignty of states, and they won all powerful federal government controlling every single aspect of everyone's lives.
The argument you made for making a minimum standard can be the same argument used to destroy all state sovereignty.
If you have a better argument, I am all ears.
But as it stands, they Department of Education meddling in the affairs of individual states is not warranted or justified under the commerce clause