Its because most people don't have the discipline and obsession of attention to detail to know when one should use an LLM and when one shouldn't.
I highly doubt the best of the best folks are even touching LLMs (barely) because they can see the flaws and the tradeoffs that are not-so-visible to others until they are 50 levels deep, with sunk investments, unwilling to go back to how they used to do things.