I really don't get To Pimp A Butterfly

I'm listening to a bunch of songs off the album and I'm getting that he Kendrick Lamar is a very good lyricist and he is he masterfully writes these songs but they're not really songs they're just spoken word I don't see that there's not much of a rhythm asked back to it other than sometimes he rhymes and And there's music in the background that's really all I get I don't get why it's one of considered one of the best albums of all time