What's one thing ChatGPT can't help with when learning English?

I’m working with several non-native tech founders who are building globally but still run into difficulties — especially when speaking socially or presenting on stage. ChatGPT helps a lot, but it often misses the mark on tone, nuance, or how something feels to say. I’m trying to understand what still feels hard — not grammatically, but emotionally, socially, or situationally.

What’s one moment when you wished ChatGPT-like tool could help — but knew it couldn’t?