I feel your post downplays the role of manager. They're needed to make sure everyone's doing their job, business needs are being met, and communication is made

I feel your post downplays the role of manager. They're needed to make sure everyone's doing their job, business needs are being met, and communication is made between the workers and executives. Having an experienced engineer play the role of management makes the communication between highly technical engineers and highly abstract executives much smoother.