For me the message of "Simple Truth" was that the intelligence should not be used to defeat itself. To be right, even if you can't define it to philosopher's satisfaction, is better than to be wrong, even if you can find some smart words to support that. The truth business is not about words (that's signalling business), but when you are right, nature rewards you, and when you are wrong, nature punishes you. (Although among humans, speaking truth can cause you a lot of trouble.) At the same time it explains the origins of our ability to understand truth -- we have this ability because having it was an evolutionary advantage.

Or maybe I just like that the annoying wise-ass guy dies in the end.

This is not about religious people, who disagree about what is actually true, as you said. This is about people who try to do "philosophy" by inventing more complex ways to sound stupid... errr... profound, and perhaps they even sometimes succeed to convince themselves. People who say things like "there is no truth", because for anything you say they can generate a long sequence of words that you just don't have time to analyze and debunk (and even if you did, they would just use a fraction of that time to generate a new sequence of words). If you didn't meet such people, consider yourself lucky, but I know people who can role-play Mark and thus ruin any chance of a rational discussion, and for a non-x-rational listener it often seems like their arguments are rather important and deep, and should be addressed seriously.

Anyway, the "Simple Truth" is kinda long, which I enjoyed, but other people may hate; so it is probably no harm in removing it, as long as "Making Beliefs Pay Rent" and "Something to Protect" stays in the list.