[Maursault]

> Except Paul McCartney is considered as one of the best song writers of all time.

This is a loaded observation, basically arguing "because all his songs sold well, he must be a significant outlier in songwriting." Similarly, Apple is considered one the best cell phone manufacturers of all time, or McDonald's is considered one of the best burger manufacturers of all time. Popularity does not equate to whether something is any good. And not all of McCartney's songs are the best songs of all time. Some of his notably terrible songs are still popular because he, himself, is famous (because he was a Beatle). One example is the Wing's song Jet, which is popular enough to still get radio play, yet when critically analyzed falls quite short of, say, Hey, Jude.

But my argument is not that Paul McCartney can't write good songs, only that it is ordinary that a musician can recall to perform music they have heard before in the same way most that read something impactful to them can more or less recall it verbatim.