It is. Unfortunately, no-one has come up with a viable self teaching system. They are trying to brute force it, but have run into a wall. Without a knowledge engine, you can’t close the loop. Without closing the loop, self reflection is impossible. Without self reflection, hallucination filtering is almost impossible. Such a system can’t understand the difference between a discussion down the pub, and a lawyer’s legal brief. It can see the difference, and mimic it’s structure, but not understand the why, and account for it.