What domain expertise do you still not trust Claude/ChatGPT with?

Everyone talks about what AI can do. I'm more interested in what it can't do well, specifically where you need a real domain expert and the model's answer isn't good enough even with a good prompt. Example: ask it for a market analysis and you get something that reads like a Chief Strategy Officer slide deck. Megatrends, buzzwords, "the market is shifting toward X." Nothing wrong on the surface. But there's no actual strategy in it, nothing tied to the company's specific position, resources, or constraints. It's the shape of strategic thinking with none of the substance. Curious what others have run into. What's the last thing you had to hand back to a human because the model's version wasn't trustworthy enough, and why?