LLMs are a great tool, but the narrative around them is not healthy and will burn a lot of real users.
That sounds like a definition you just made up to fit your story. A system can both make bigger leaps in a field where the smartest human is unfamiliar and make dumber mistakes than a 10 year old. I can say that confidently, because we have such systems. We call them LLMs.
It's like claiming that it can't both be sunny and rainy. Nevertheless, it happens.
For AIs, having incredibly narrow capabilities is the norm rather than an exception. That doesn't make those narrow superhuman AIs any less superhuman. I could spend a lifetime doing nothing but learning chess and Deep Blue would still kick my shit in on the chessboard.