Fortunately for we humans, distortion of lower frequencies isn’t as audible/objectionable to our ear/brain mechanism as is distortion of higher frequencies. Right, Ralph? Since the beginning of hi-fi and continuing to this day, woofers commonly produce 10% (and higher) harmonic distortion. If a tweeter produced that much distortion it would be unlistenable.
If only @kenjit would put into production one of his perfect loudspeaker designs. The selfish sob is keeping them all to himself.