'Miss Americana' won't change your mind about Taylor Swift, but it's not trying to

A few minutes into Taylor Swift: Miss Americana, Taylor Swift describes the "moral code" that's guided much of her life as "a need to be thought of as good." 

The obvious key word there is "good," which fits neatly into the image Swift has projected for most of her career — as a sweet, innocent good girl, give or take a...