Maybe the nothingness is because LLM can't reason. Maybe it's because it was trained a bit too much in marketing speak and corporate speak.
The thing is, while LLMs can replicate this or that style, they can't actually express opinions. LLM can never not be fluff. Maybe different types of AI can make use of LLM as part of their components, but while we keep putting all of our tokens in LLMs, we will forever get slop.