"GREAT! That means we can fire the people who do the actual work, and replace them with MBA robots, who neither understand nor care about making a good product"
Pardon my pessimism, but in my whole career, I have never met a PM who actual did the work of driving the product vision. Most were just middlemen shuttling information between management, marketing, design, and engineering. Thinking that hiring more PMs would increase the output in the age of AI is such a childish fantasy.