> The worker claimed it was "his first time using AI" and "he didn't know"

This is not the defense they think it is.. If your mechanic rotates your tires and improperly torques the lug bolts "it was my first time using a torque wrench" isn't excusable. It's good to experiment and learn new things. It's not good to throw your little self-study project out into the world with your employer's name behind it and present it as production worthy material.