What Arguments are made that state the USCON is/should be Original?

-USCON has an Amendment Process to allow its Changing Needs -If the USCON can be changed by 9 Unelected Justices, the People have no way to hold them to Account -The Supreme Court powers come from Previous Court Cases, not the USCON -A Flexible Constitution can be Misinterpreted to lead to Political Ends rather than Protecting