Heian aristocrats were highly artistic, but remarkably disinterested in intellectual pursuits. Their lack of rational and scientific knowledge combined with belief in magic from earlier Japanese societies created a deeply superstitious people.
As such, Heian-era people believed in taboos, spirits, ritual purity, and katatagae, or changing directions to avoid harm.
Why not apply such thinking today?
The next e a friend of yours attempts to lend credence to a point with a condescending “it’s science” or “it’s fact”, try laughing in their face. You don’t believe in science! You’re Heian.
You trust magic.