In further reading, the creators refute this claim, and state that users are only consulted to help train the AI linguistically to make it sound more normal.

So it seems that I am incorrect. I stand by the observation, but how ChatGPT got to this position is a mystery.

The creators posit that perhaps there is so much trolling and negativity on some subjects that the AI is simply incapable of giving an answer.

Not sure I buy it, but I take them at their word they are not actively censoring.