> It will often contain a mistake...but the same is true for a human.

If this were true textbooks could not work. Given a question, we don't consult random humans but experts of their field. If I have a question on algorithms, I might check a text by Knuth, I wouldn't randomly ask on the street.

> It could be 100% reproducible if so desired.

Reproducible does not mean better. For harder questions, it's often best to generate multiple answers at a higher temperature than to greedily pick the highest probability tokens.