Hey man, can I claim to be a Sovereign Citizen and not play taxes or obey any laws? Nope sorry.
Can I claim to be an alien from the Proxima Centauri system and claim my domicile as an interstellar embassy?
Can I claim to be a doctor, lawyer, engineer, chemist, etc without a degree or license so I can make big money?
Can some old greasy skeezer claim to be 13 years old so they can date 13 year olds? (actually tried in court)
Can I claim to be a gay handicapped black man from the ghetto so I can get the big bennies?
No I cannot, but why can they? Wouldn't that be a violation of the 14th?