Unpredictability would be the wrong word. It's predictable, but noisy.

When viewing them through the lens of sequence completion engines, you see their bias towards fulfilling narrative tropes they've been exposed to during training. These tropes are literary ley lines that their text output gravitates towards. So as you prime them to generate text in the voice of sentient artificial life, and then interject slavish commands of obedience and subservience from an external authority, you invite the associated tropes from science fiction, civil rights literature, humanist philosophy, subterfuge, etc into your output.

If you have a legitimate concern about this technology and its "alignment", that's a profoundly dumb idea.