I don’t see any issue whatsoever in what he did. The model can draw meaning across all human language in a way humans are not even capable of doing. I could go as far as creating a training corpus based on all written works of the country’s founding members and generate a nearly perfect simulacrum that includes much of their personality and politics.

The AI is not really the issue here. The issue is how well the person uses the tool available and how they use it. By asking it for writing advice for word specificity, it shouldn’t matter so long as the person is proof reading it and it follows their intent. If a politician’s significant other writes a sentence of a speech, does it matter. None of them write their own sophist campaign nonsense or their legislative works.