They can say what they want.
By writing something down you don't make it ok. It's an illusion. Even the constitution.
Of course if you believe in pieces of paper that you know about (or don't know about) have legitimate power over you, then by believing it, you made is so.
You have no moral obligation to obey anyone in this world. That you pay your taxes because of the violence that follows does not make it legitimate.
Do you realize that you yourself, by saying that they have power over me, normalize it?
It's a mind trap.