There are plenty of comedians who are working the truth constantly. Josh Johnson, Michelle Wolf, Lewis Black, Bill Burr, John Fugelsang and Lee Camp leap to mind right away. Certainly Carlin, Bill Hicks and even Johnny Carson knew how to poke the power.
I think it is especially important for comedians to speak out. They are the ones who call out nonsense, piffle, lies, hypocrisy and utter bull💩. We depend on them to remind us of reality.