Yes, I take your point.
But if I said "I don't understand the point of brakes. Why do all cars get made with brakes?", then as well as making your point ("look, do you really think you know better than Stellantis!?") there's also a straightforward answer which is "cars need brakes so they can stop instead of killing people."
What's the "straightforward answer" case for the existence of managers? Your answer just suggests that such an answer does exist, without revealing what it is.