The point he is making is not consistent with understanding how temperature influences LLM text generation, no.

He repeatedly states that choosing "the best word" is the most important thing to him. I don't know how you reconcile that with creativity itself, let alone probabilistic sampling.

I mean creativity there in the LLM sense (temperature driving more creative solutions), not the human sense, and in the context of its consistency, configurability and being amenable to analysis. The watermarking approach makes that non-reproducible, yes? Because Anthropic can and will change it as they see fit.