LLMs would be automation if they were deterministic. Since they are not, they are just sources of incorrect information that needs to be corrected by a human.

Ask an author if they'd like a job as a fact checker or a spell checker. While those are both skills, they are not skills many people aspire to, and they are not of higher order value. While people deal with incorrect information all day long and mispelled words without it disrupting their life a computer cannot do that same.

Pity for it.

You can have 100% accuracy with non-determinism. The time is just variable.

https://en.wikipedia.org/wiki/Las_Vegas_algorithm

This is not to say you can ALWAYS have 100% accuracy from something non-deterministic. Just that non-determinism doesnt necessarily make something inaccurate.