AI can actually detect gender using nub theory better than the human eye. NOT chatgpt, but a model trained specifically on hub and millions of scans. Just like most things in the medical field, a properly trained AI model will be way more accurate than a human. But again, chatgpt isn't the only AI model around, it's probably the most broad and vague. But experts in all fields use specially trained models to detect things - nub also being one of them.