On the one hand, I think this highlights an important "blind spot" in human thought. Our ideas and creativity are hugely influenced by our environment and prevailing social conventions. It's strange he doesn't use the term "Overton Window", because that's exactly what he's talking about and it seems useful to place his thoughts in context with the existing body.
On the other hand, I vehemently disagree with the implicit assertion that any truth should be acceptable to give power. It's easy to filter, twist, and reassemble the truth to deceive and manipulate. Humanity has already paid too steep a price learning why some truths and ideas must be rejected. In fact, the ideology of "free speech absolutism" is itself an orthodoxy specific to a relatively small cultural bubble, and it's objectively quite extreme.
On the other hand, I vehemently disagree with the implicit assertion that any truth should be acceptable to give power. It's easy to filter, twist, and reassemble the truth to deceive and manipulate. Humanity has already paid too steep a price learning why some truths and ideas must be rejected. In fact, the ideology of "free speech absolutism" is itself an orthodoxy specific to a relatively small cultural bubble, and it's objectively quite extreme.