> Because they are not deterministic; you can't use experience with LLMs in any meaningful way. They may give you a different result when you run the same spec through the LLM a second time.

Lots of things, and indeed humans, are also as non-deterministic; I absolutely do use experience working with humans and non-deterministic things to improve my future interactions with them.

Table saws are kinda infamous in this regard: you may say that kick-back is hidden state/incomplete information rather than non-deterministic, but in practice the impact is the same.