I don't think it's objectively harder - at the very least, [citation needed]. It might be subjectively harder for you. But one is a random factoid, the other one is a story. Humans are, in general, exceedingly good at stories. Facts, we tend to focus on the areas we know. You and I might be good at physics facts, or software facts. Somebody else might be good at agriculture facts, or knitting facts, or what-have-you.

But stories are universal. They connect. It's how most of humanity learns and shares knowledge. (See e.g. https://www.nature.com/articles/s41467-017-02036-8)

There's a pretty good likelihood that stories are ultimately easier to remember for a larger number of people than facts.

>>> Then, as citizens, they make obvious mistakes about the relative costs and effects of things they advocate for

I'll note that you're possibly wrong about relative costs of learning, too. What matters isn't only what you learn (though teaching stats would sure be a good thing), but also a willingness to approach issues with a bit of humility, and not claiming something as absolute fact until it provably is.