If I had to guess, i think most of it comes down to not wanting to understand how society works, and finding it easier to think everything should come for free to them. If I couldn’t afford my car payments and someone told me that if you’re a sovereign citizen, you don’t have to pay, I could see how desperation could lead people to think they could get out of obligations. There’s also probably a large group of influencers and scammers who are incentivized to spread this misinformation, which is how it spreads.

It’s also likely that for minor infractions, they’re let off with a warning from an officer who doesn’t want to deal with them, and this emboldens them to think they’re correct in how society functions, until they get an officer who won’t put up with them, or do something so egregious, it can’t be ignored.