A lot of American folk is rooted in the poverty of the depression. One can analyze a folk musician's music in that light without being taken as asserting that the musician was impoverished during the depression. Why can't people read an analysis of music in the light of racism without freaking out that the musician is being called racist?
How does one not "freak out" when the words you choose literally imply that position:
there's nothing The Beach Boys could have done short of being born in a different time or place to avoid the statement that their music was rooted in institutional racism.
This is an example of 2+2=5.
The music itself could not have been "rooted" in institutional racism because the music was rooted in Brian's garage, based on The Four Freshman harmonies and Chuck Berry rhythms. That is a literal explanation of where the music was born from. What you are trying to blend into the discussion is something else entirely.
By this logic, all the music from Motown and Stax was also rooted in institutional racism.*
*Unless, that doesn't count because only whites were the aggressors of institutional racism because of their privilege. Another example of irresponsible over-generalizing.