What seems to be going on, I think, is largely a one-sided story. There are many people with bullhorns who speak, for whatever reasons, but who seem to go largely unchallenged. Whether that's due to unawareness, lack of critical thought, laziness, or perceived distance (e.g. "I think things are still fine with me; I can't or don't see how this could affect me."), I can't say for certain, but I imagine many people are affected by some combination of them all.

What I can say we do need more of, however, is well-engaged, open and honest discussion. Having leading voices speak your mind can be very good, but central figures can be fallible. A better solution would be to have input from humans in the "silent majority", whatever that might be.