Interestingly, humans tend to underestimate complexity even when it's right under their noses. In music world you can see it everywhere with your average band attempting cover versions of popular songs. It's the reason the results often sound nothing like the originals: melodies vastly simplified, textural sounds are omitted, harmonizing melodies absent, rhythm parts dumbed down, timbres approximated. "Yeah, it's a simple song with 4 chords, we can rehearse it in a day or two".

When your ear develops, you can hear that the real simple song is an outlier.