Today, we know about "non-debt" or "commodity money" (gold, crypto) but use "debt money" (fiat). Aside from Gresham's law, this also illustrates that humans prefer beautiful lies to sad truths.
There's also a related quote that I like a lot. It's from the "The Big Short" movie - a movie which also illustrates our collective addiction to beautiful lies and our antipathy towards sad truths. It goes like this:
"Truth is like poetry. And everybody f---ing hates poetry."