The LLM isn’t trained to be reliable, it’s trained to be confident.
And it's promoted by business people with the exact same skill set who have been rewarded for it. I would argue though that there's nothing wrong with what LLMs are doing: they're doing what they were trained to do. The con is in how the confidently unreliable techbros sell it to us as a source of knowledge and understanding akin to a search engine, when it's nothing of the sort.