Going on this kind of logic, Billy Beane, John Gibbons, Sparky Anderson and on and on know nothing about baseball and should have never/ should never critisize current players. It's pretty idiotic to judge knowledge by how well someone played. Many, many great managers, coaches, scouts and analysts have been failed players. Natural physical gifts and knowledge are not the same. I'd even expect that less gifted players had to work harder, learn more and experience more finite coaching during their playing days and would be better judges of what's what on a ball field.
There's a reason Ricky Henderson is not a coach or a TV analyst. I suppose that he should be by JPA and Lind logic.