On the matter of Compartmentalization, that was one that really demonstrated proof to me, that the masses act as-if they had Free-Will, while denying it whenever and wherever convenient. It’s selective, based on emotional whim. The masses do not adhere to Logic or Rationality, which is also why they (pretty much always in the end) leave it to “Trust the Experts”. By “Experts” of course, they mean their political-party’s hand-selected Propagandists and “Scientists”. Or more commonly, it’s up to the Law, the Judge, the Jury, to decide when or not people are hypothetically responsible for their actions.
Compartmentalization is Convenience. Free-Will exists whenever I do something good and am rewarded by greater Society, upward mobility, receiving accolades, fame, popularity, wealth, etc. – but it no longer exists whenever I do something bad, make a mistake, go drunk driving and plow my truck into a small sedan full of kids and their mother… or when I masturbate in public. So when life and experience is Negative, everything is Predetermined. But when life and experience is Positive, then I “freely chose” my way to my rewards and benefits.
In other words, Free-Will exists when I must or need to take responsibility for my rewards. I want “what’s mine”. I own my property, my mansion, my garage full of sports cars. I earned my rewards. Without Free-Will, I could not possibly take responsible or ownership of anything. How could I, how could anybody? “Ownership” would be yet another delusion, illusion, tool of manipulation. People would not be able to believe in Ownership, without Free-Will.