Ideology

Just had a sudden thought.
There are seldom gigs that uphold/support certain values or ideas.
Even if so, like maybe this epilepsy gig we played before,
the bands themselves aren't into the cause.
Sorry if I'm sounding political which I'm not trying to,
but it would be fun to play for a cause. Something you believe in.
I mean, most people say they play because they want to express themselves,
because they believe in their music and not what people think about it.
Why not take it one step further?