I suggest you check your Constitution. It does not empower Congress to determine any aspect of how court proceeding will be conducted. Their authority to create courts does not give them any power to dictate the way judges will try individual cases. You are simply misinformed here. The power to create a court does not give them the power to control individual court hearings from the floor of Congress.
Enjoy your emanating penumbras. Your interpretation of the U.S. Constitution would make Anthony Kennedy proud. Perhaps you could find some international law from Nigeria or Thailand to support your view. You certainly won't find it in the plain meaning of constitutional text.
They create the law under which the rules of procedure are derived. They can rewrite the laws any way they wish.