You’re missing the forest for the trees.

Mainstream appeal requires certain sacrifices, and message is one of the first things on the block. Representation on that scale requires backroom assurances that do not allow the system to be rebuked in the way you are looking to see. Sure, you can have outspoken individuals like Dave grohl or Tom Morello making their opinions known, but the Foo Fighters will still play in Israel if the paycheck is big enough. Doesn’t matter how much blood is under the stage, money talks.

Get into the punk/folk scene.

Wingnut Dishwashers Union Pat the Bunny Daze N Days The Orphans

Really anything in this genre. You’d be surprised at the observations made by people living on the streets or just generally down on their luck.