Not sure what your point is.

Sure, AI output is kind of random.

But that's also basically true for humans. It's harder to "prove" humans are random, but wouldn't you think a person would do things slightly differently when given the same tasks but on different days? People change their minds a lot, it's just that there's no "reconsider" button for people so you feel a bit of social friction if you pester somebody to rethink an issue. But it's no different.

I'd be really surprised if your point is that humans, unlike AI, are super deterministic and that's why they are so much more trustworthy and smarter than AI...