These people should never be given a voice. There is no justification for that. Voices should always be edited and filtered by higher powers.
The common opinion is worth nothing, since we already know what it is, so why repeat it?
Echo chamber is still an echo chamber even if you like the sound of the echoes.
The people with power who try to screw over society for their own benefit always go with the same argument. I know best, so please give me all the power so I can use it to enrich myself.
I know it's fundamentally undemocratic. But pragmatically it wasn't the worst. Another example would be the trust people (used to) have in the Supreme Court. For most of the 20th century, it was the most rigorous intellectual and moral institution, even though it's the least democratic.