Speed and cost are nothing without quality and quality is partially a product of accountability (not even considering the technical or logistical issues this is enough on its own.
An AI cannot be held accountable. It does not desire to feed its family.
Your counter argument was outside the context of this articles claims, specifically that programmers and other knowledge workers can be replaced by LLMs.
Equating simple yes/no outcomes generated by vision based machine learning is quite different than “build me a product people will be happy with” being asked of a non-deterministic machine.