Sure, let me be blunt.

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.

> Speed and cost are nothing without quality

Quality was what the hypothetical was assuming had reached parity, no? ("humans are as bad as AI", "If AI really is at human level quality/error rate", etc.)

> accountability

Why could the company not still take accountability? That's already the case for non-ML automated systems, some with high failure rates. As a customer I rarely if ever care about blame being pinned on a specific employee.

> Your counter argument was outside the context of this articles claims, specifically that programmers and other knowledge workers can be replaced by LLMs.

AndrewKemendo's comment and your reply ("any humans", "replace humans") seemed to generalize, but speed and cost being important factors is still true for knowledge work. For some given level of quality, a web developer offering a lower quote with shorter turnaround time will be preferred to one offering a higher quote with longer turnaround time.