A lot of this is also missing understanding the software we're creating. I have a deep knowledge of our SaaS because I've spent years working on coding it. If I had been prompting an LLM this entire time, I can't imagine I would actually have near the same understanding. That is assuming purely planning and prompting could actually result in a product that's in active use for years and not just a pile of prototypes which apparently desperately needed to be created and were just waiting for AI to come along to make it possible.
I've been using AI tools more but this idea of never actually writing any code seems way too black and white to be serious.