What people don’t like is that the input-output relation of LLMs is difficult, if not impossible, to reason about. While determinism isn’t the only factor here

What people don’t like is that the input-output relation of LLMs is difficult, if not impossible, to reason about. While determinism isn’t the only factor here (you can have a fully deterministic system that is still unpredictable in practical terms), it is still a factor.