Clever. Take the obvious objection--that this is all based on stereotyping of the role and, frankly, cynical assumptions about the way management is or can be structured--and then just turn it into another symptom of management dysfunction!
How very tautological: Before you tell me I'm wrong, let me tell you you're wrong for telling me I'm wrong.
And yes, I'm a manager. And no, I never spent time '[walking] the floors, “[keeping] an eye on people” and, in meetings, “[speaking] for the group.”'' because I have far far more important things to do, like helping my staff understand the corporate vision so they can make good, independent decisions; helping solve problems for my staff when they come to me with issues; working with our sales team to manage customer expectations and negotiate on projects and solutions; managing the expectations of senior management based on the information I'm getting from my staff. And the list goes on and on.
But, who am I to say. I'm just a middle manager who is, I'm sure, just part of the problem...