Most poeple have never had a practical opportunity to decide whether or not they will choose to comply with the law or government authority without any threat of violence, because the threat of violence is always present if they fail to comply.
This obviously does not mean that people would never comply if the threat of violence were removed. Much of the time the law aligns with what people would choose to do anyway, so compliance comes naturally. The interesting case are those where natural inclination is at odds with the law (or with the orders of a government official), and in those cases I think you might be overestimating the average person's willingness to comply without being forced.
I'm not seeing an issue here. Theory which one cannot apply to reality is rather pointless; wouldn't you agree?
> That's not how real people function, including (almost certainly) you.
Which part are you objecting to, exactly? That (a) people tend to follow the law when it aligns with what they would have chosen to do anyway, or that (b) they tend not to constrain themselves to following the law when the law doesn't align with their own moral standards and no one is plausibly threatening them with violent repercussions should they fail to comply?
I think this is outlandish. Most people are law-abiding and happily comply with the law and government authority without any threat of violence. I don't think I've ever had it factor into my decision-making.