We’re so used to measurements that matter: teaspoons for cooking, CCs for medicine, gallons for gas, square footage for rooms.
It then boggles us when the difference in percentages of distortion, dips and bumps in frequency, or phase accuracy, can’t reliably and adequately describe what our ears tell us matter.
Maddening to the point of denial for many.
But then someone discovers new labels for quantification, like toe tapping or noise levels or harmonic accuracy (whatever that is) or the word of a reviewer and then we can all relax.
It’s hard for us to trust our senses.
Not many do.