HD,
Not so fast in that flame-proof Chieftain.
You're spot on.
Those who can, do.
Those who can't do, teach. (O.K there are exceptions here).
Those who excel in neither of the above fields, call themselves 'managers'.
P.S. Don't get me started on 'Consultants', 'Co-ordinators', 'Business Partners', or those self-proclaimed 'Experts' who are frequently interviewed on the BBC.
It seems to me that 'losers' who can't make the 'officer class', often worm their way into positions of authority where they attempt to undermine or demean those who can.
Hope all's well in Manila. Keep pushing the envelope!