Undoubtedly his tool turned out to suck, and his managers realized that it made him faster but didn't eliminate the need for his role. "Every other manager" is a pipe dream and if it's true it means that group is pathetically inefficient and underutilizing the talents of even an average manager.
That's what I'd say in 2026. 2-3 years from now, not sure. But right now, AI can't run a vending machine without selling too many tungsten cubes.