An organization which claims to be working for the needs of a community - as SNCC does - must work to provide that community with a position of strength from which to make its voice heard. This is the significance of black power beyond the slogan.
To be able to work with actors who are doing such good work, not only makes it easier for you, but it makes you better.
There's something about being in a house with an audience, and having that immediate feedback. I started acting because of that energy; it's what feeds me on stage and informs my choices.