Harmonic mean is the reciprocal of arithmetic mean of reciprocal. Real artists are not mathophobes.

Equations are also sometimes likened to poems.

"Of course an equation can be beautiful and mysterious, but the beauty, even if sometimes reflected in its typography, cannot be divorced from its meaning."

Sander Bais

Poets do not write to be understood. We cannot allow artists to draw pictures for an idealized rational user when real humans are irrational.

"I don't like numbers that can't be written as a fraction. It's an irrational fear."