The purpose of any policy is not only to effect change but also to educate the public. This educational function is important yet rarely discussed explicitly, perhaps for fear of looking like a propagandist. So be it: I wholeheartedly embrace the notion of policy as a way of educating voters.
How does this work? Consider the moon landing of 1969. It had some concrete benefits, such as preventing the Soviets from militarizing space. But just as important was the message it communicated to the American public: Think big, it said; science can lead to grand and amazing achievements. The educational aspect of the policy greatly increased its value.
Or consider NAFTA, and its successor agreement USMCA. These “free trade” agreements actually increased a lot of regulations, and their free-trade benefits are actually pretty small (though still positive). Still, I am enthusiastic about the policies. If nothing else, they sent voters the message that trade and regional cooperation is a good thing and ought to be encouraged. This educational effect was especially useful in Mexico, as the underlying assumption of the message is that Mexico is a stable democracy on a par with the rest of North America.