Well, thank you for editing your own comment and adding that last bit, because it really is the crux of the issue and the reason why OP is being downvoted.
Having all of the worlds knowledge is not the same as being smart.
Sometimes. When the stars align and you roll the dice the right way. I'm currently using ChatGPT 5.1 to put together a list of meals for the upcoming week, it comes up with a list(very good one!), then it asks if I want a list of ingredients, I say yes, and the ingredients are completely bollocks. Like it adds things which are not in any recipe. I ask about it, it says "sorry, my mistake, here's the list fixed now" and it just removed that thing but added something else. I ask why is that there, and I shit you not, it replied with "I added it out of habit" - like what habit, what an idiotic thing to say. It took me 3 more attempts to get a list that was actually somewhat correct, although it got the quantities wrong. "infinitely better than a human at text based tasks" my ass.
I would honestly trust a 12 year old child to do this over this thing I'm supposedly paying £18.99/month for. And the company is valued at half a trillion dollars. I honestly wonder if I'm the bigger clown or if they are.
Source code generation is possible due to large training set and effort put into reinforcing better outcomes.
I suspect debugging is not that straightforward to LLM'ize.
It's a non-sequential interaction - when something happens, it's not necessarily caused the problem, timeline may be shuffled. LLM would need tons of examples where something happens in debugger or logs and associate it with another abstraction.
I was debugging something in gdb recently and it was a pretty challenging bug. Out of interest I tried chatgpt, and it was hopeless - try this, add this print etc. That's not how you debug multi-threaded and async code. When I found the root cause, I was analyzing how I did it and where did I learn that specific combination of techniques, each individually well documented, but never in combination - it was learning from other people and my own experience.