"Word-guessing?" How does this naive notion persist?
Its really sad how many moronic human responses are generated by every AI story. Its like sport and politics there.
Why do people feel a need to be so opinionated on a topic they clearly know nothing about? OK, not literally nothing, but just enough for Dunning Kruger.
AIs are indeed used to train AIs, but mostly they train themselves. i.e. most of the compute power in training a new model is self-supervised.
Human feedback is a small but important part of post-training, and you don't hire expensive humans for a task that can be done by AI.
So yes, if a human is doing training (probably just A/B choice) , there must be a good reason why they are not already using AI for that particular task.