Maybe that's the way to sound both Scientific and Humane.
They can't admit that there might be something else at work. We've satellites, man on the moon, particle accelerators, loyal puppies in the name of Newton's laws. How could they, after all this, admit something strange.?
But they can't confess the alternative to that is the hard ruthless idea that we are no different from a piece of stone we kick on the way to school.
So keep fiddling between the two ideas and throw in silly jokes here and there so the audience feel good about attending a totally pointless lecture. And people laughing to that dumb line, "or maybe you want to file a lawsuit on the brick thrower so you stifle the urge to move away"..! God, i wish there isn't any freewill. Only random mutations and natural selection could pump out such morons.