they do have a point in saying “fuck you” to the authority.
The don’t say “fuck you” though - they say “gotcha!”. The way I understand it, the Sovereign Citizens Movement is a cargo cult. They hear about all the billionaires who barely pay taxes thanks to clever accounting and all the criminals who escape punishment on technicalities, and figure that “if the law can be manipulated - why can’t we manipulate it?”
Do they “have a point”? Maybe, in the same way alchemy had a point that lead and gold are made of the same fundamental matter and therefore one can be converted to the other. In the same way humoralist medicine had a point that the human body has various substances that must be balanced to maintain health. They’ve all had a point in that they’ve managed to glimpse at the nature of the problem - and they all fail by grossly underestimating the actual complexity of the model and the amount of effort, resources and expertise required to achieve their goals.
I wouldn’t be surprised if an expert legal team could achieve some of the things SovCits are trying to achieve. But that would require lots of hard work from them, and SovCits have managed to convince themselves that all it takes is a few magic phrases. I leave it to anthropologists to figure out how they came to think they could so easily figure out what these magic phrases are.