In the 60s, mass media liberalized pretty quickly in all mediums as decreases in production costs broadened access and led to more experimentation and less ability for a limited set of gatekeepers to police content against historical norms.
F.ex. Motown Records was literally founded in the back of a house. [0]
It's more difficult to say "There's no market for African American music, so we're not going to make any" when someone is technically able to demonstrate otherwise on their own.
Without technical disruption (mostly, in the falling cost and footprint of capable equipment), it could have been business as usual and a lot of ideas would have remained uncirculated.
