I mean, that's kinda like saying a random number generator can be deterministic. It can be, but that's not how it's used.
Sure LLMs can be deterministic, but they aren't in practice cause it makes the results worse. If you prompt any production LLM with the same inputs, you aren't guaranteed the same outputs.
Yeah, I don't think the creator was very rigorous in their research. I feel like the Halo rings have to have more impact than the death star.