Since I'm on the Product side these days, I don't spend much time delving into the codebase at this point in my career. I can believe it though, as I've done quite a few personal side projects using langchain and various harnesses. The problem I see is not necessarily that LLMs build things badly (although I know that can also be true), its that because people are using LLMs to generate documents, we are then building the wrong thing entirely (whether with an LLM or not, whether badly or not).

Removing human thought from the process of development is generally a net negative, IMO.