One of the effects on software development is: the fact that you submitted a PR with any LoC count doesn't mean that you did any work. You need to explain your solution and answer questions to prove that.
The LLM-optimist view at the moment, which takes on board the need to review LLMs, assumes that this review capability will exist. I cannot review LLM output on areas outside of my expertise. I cannot develop the expertise I need if I use an LLM in-the-large.
I first encountered this issue ~year-ago when using an LLM to prototype a programming language compiler (a field I knew quite well anyway) -- but realised that very large decisions about the language were being forced by LLM implementation.
Then, over the last three weeks, I've had to refresh my expertise in some areas of statistics and realised much of my note taking with LLMs has completely undermined this process -- the effective actions have been, in follow on, traditional methods: reading books, watching lectures, taking notes. The LLM is only a small time saver, "in the small" once I'm an expert. It's absolutely disabling as a route back to expertise.