I have a degree in mathematics followed by twenty years in software development (pillory me, if you like). My conclusions after 6 months of using LLMs every day are remarkably similar to the author's. I increasingly think in shapes, architectures, data structures and ideas; less and less in lines of code.
And I fully understand his point that, once the architecture of an idea is settled, reading LLM code does not feel worse than reading human generated code. Especially if you have a strong style and conventions guide.
The idea is the hard part, and it's the right place to focus your effort.