I think your point is that some amount of unconditional respect for the law is desirable, because it works as an enforcement mechanism. Is that right? Even if it is desirable, it does not mean that there is a duty to obey unjust laws. After all, saving children from starvation is desirable, yet most people consider they have no duty to do so.
Besides, I think that societies overwhelmingly err far on the side of too much respect for the law. Most people are content to form their opinions based on the status quo, which can make for some terrifying dystopian results.
