How is this permitted? If someone wanted an answer from a bot, wouldn't they just ask it themselves?
The answers aren't even good, and worse, they're often incorrect. Chat-GPT is not a fact-based machine, and so introducing it for "facts" means that we're in the business of peddling lies.
For high-rep users, you can see just how egregious it is with this now-deleted answer.
Here's another AI answer.