I think the Chuck Berry line is a lightning rod with a white guitar may refer to this situation described in wikipedia
"Touring as Chuck Berry, the legend (1970s)
In the 1970s Berry toured on the basis of his earlier successes. He was on the road for many years, carrying only his Gibson guitar, confident that he could hire a band that already knew his music no matter where he went. Allmusic has said that in this period his "live performances became increasingly erratic, [...] working with terrible backup bands and turning in sloppy, out-of-tune performances" which "tarnished his reputation with younger fans and oldtimers" alike. [2]
Among the many bandleaders performing this backup role were Bruce Springsteen and Steve Miller when each was just starting his career. Springsteen related in the video Hail! Hail! Rock 'n' Roll that Berry did not even give the band a set list and just expected the musicians to follow his lead after each guitar intro. Berry neither spoke to nor thanked the band after the show. Nevertheless, Springsteen backed Berry again when he appeared at the concert for the Rock and Roll Hall of Fame in 1995."
I think the Chuck Berry line is a lightning rod with a white guitar may refer to this situation described in wikipedia "Touring as Chuck Berry, the legend (1970s) In the 1970s Berry toured on the basis of his earlier successes. He was on the road for many years, carrying only his Gibson guitar, confident that he could hire a band that already knew his music no matter where he went. Allmusic has said that in this period his "live performances became increasingly erratic, [...] working with terrible backup bands and turning in sloppy, out-of-tune performances" which "tarnished his reputation with younger fans and oldtimers" alike. [2]
Among the many bandleaders performing this backup role were Bruce Springsteen and Steve Miller when each was just starting his career. Springsteen related in the video Hail! Hail! Rock 'n' Roll that Berry did not even give the band a set list and just expected the musicians to follow his lead after each guitar intro. Berry neither spoke to nor thanked the band after the show. Nevertheless, Springsteen backed Berry again when he appeared at the concert for the Rock and Roll Hall of Fame in 1995."