[intended]

There are 2 contexts for speech, and within each different forces change the outcome of the same conversation. This is why I can say your analysis is resulting in erroneous outputs.

For arguments sake, let’s call it - individual only scenarios vs collective scenarios.

Individual only: What thoughts you say at home in the privacy of your house.

Collective: The vote.

In collective scenarios, the median/average choice dominate.

Eg: The chemical expert knows that chemical X is going to kill humans and avoids it.

The collective votes Yes to elect a representative who advocates for chemical X to be added to all food packaging.

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This is a very common trick question where Free Speech argument proponents falter.

Free Speech is a principle for ordering the world. With the internet, this principle needs to be applied to people who would skew or influence collective decisions.