Here is an example of how AI can be useful:
We have been working on my daughter's van. We had to replace the electric cooling fan. After getting the van put back together, we found that the cooling issues went beyond the burned-out fan. Her van has a "captive cooling system" which means, it does not have a radiator cap - instead, the reservoir bottle is pressurized while the vehicle is ion operation and the cap seals tightly to hold the pressure.
The reservoir bottle is plastic, and we discovered it has cracks in the bottom, so we had to replace that, too. When we got everything back together - again, we found there is also a small leak near the top of the radiator. OK - we can just use some 'stop leak' ... that's what we used to do it when I was younger.
So, I went to the AI search and asked what the best stop leak is to use for this van. Of course, to do so, I specified what the van is. Well, the AI directly told me NOT to use stop leak in that vehicle due to the captive cooling system and a few other reasons. Seems I could do serious and possibly irreparable damage by using the stop leak.
That seemed a bit odd and/or extreme - so, I used another AI and asked that one about the stop leak. I got the same type of response. It also told me not to do it unless it was strictly an emergency and we were just trying to limp it off the road or get it back home.
So, I asked a mechanic I know. An actual human mechanic who makes his living fixing cars. He verified what the AI's told me.
We have a new radiator ordered and should be able to install it next week.
In this case, the AI did not give us wrong information, hallucinate or make stuff up. It actually saved us money and headaches.