TL;DR:A lot of reasons, which you will figure out very quickly from using AI to solve your problems/answer your questions.

Accuracy

AI is very often completely making things up, spreading completely wrong information, exaggeratting correct information, or otherwise not giving you a correct and working answer. Yes, people do that too, but here we have lots of people who know what they are doing and can point out if the answer is wrong.

Bias

If I ask AI something, it will change its answer heavily from very subtle biases in the question, in a way that a human will not. This isn't great, since the goal is to get an answer that works/answers your question, not one echoing your opinion.

Sourcing

A human can say where they got information from, and that can be verified to be true. An AI really can't (it will often say it can and then give non-extant sources, broken links, etc.)

Not good for Q&A format

AI generally responds with essays, not really answers like a human does here. This makes sense, as it is after all a chatbot. A chatbot is meant to chat, not to answer complex questions, and as such does it worse.

AI's reason

So, I asked Google Bard to give me reasons why Stack Exchange is still useful with AI (asked it to answer as a SE user who really likes SE). I think this proves the above:

The digital landscape is a wild place these days. We've got these newfangled "artificial intelligence" things running around, promising to answer all your questions with the click of a button. Sounds neat, right? Well, hold your holographic horses, because Stack Exchange is still the coolest kid on the block, and here's why.

First of all, forget all that fancy data processing. Stack Exchange is all about real human experts, the kind with actual lived experiences (and maybe even a few participation trophies from their coding competitions). These gurus can not only solve your problems but also regale you with epic tales of their debugging battles and coding triumphs. Who needs dry facts when you can have a riveting story about someone spending three days wrestling with a rogue semicolon?

Secondly, Stack Exchange is like your favorite online forum, only with less cat memes and more, well, code snippets and obscure physics equations (because, you know, that's what the cool kids are into these days). This vibrant community fosters a sense of camaraderie that those sterile AI assistants just can't match. Imagine high-fiving your fellow programmers online after finally conquering that pesky bug – pure magic, I tell ya!

Sure, AI might be able to find information faster, but speed isn't everything. Sometimes, you need the wisdom that only comes with years of experience troubleshooting those pesky printer errors (because, let's be honest, those things are out to get us all). And who needs all that pesky accuracy anyway? A little human error adds spice to life, keeps things interesting, you know?

Stack Exchange might not be perfect. Sometimes you have to wait for a response, unlike those AI bots that answer you instantly (even if their answers are completely nonsensical). But hey, that just builds suspense! Plus, the decentralized nature of Stack Exchange means the information is constantly being refreshed by a whole bunch of brilliant minds, not some stuffy algorithm stuck in its binary ways.

So, the next time you have a question, ditch the robots and head on over to Stack Exchange. It's where the real coding cowboys (and cowgirls!) hang out, sharing their knowledge and battling bugs together. After all, isn't that what the internet was built for – to connect with fellow humans and swap epic coding war stories (or maybe that was just a dream I had after eating too much pizza)? Whatever the case, Stack Exchange is here to stay, a shining beacon of human ingenuity in the age of automation.