...and there's nothing to say that that ex pro was a universal example of how players respond, and I'm sure that many players do not 'zone out' when spoken to. In football, as in life, people are motivated and influenced in different ways. Its obvious that the likes of a Guardiola or a Mourinho (when at his best) - as well as countless other managers - influence their players' shape, and help them read the game and implement their tactics. To the extent that a manager is a coach - it seems obvious that tactical specialists can assist their teams during games.
As for Wenger - I'll meet you by referring you to those players who have spoken about Wenger 'losing it' in the dressing room while at Monaco. I don't doubt that maybe he now favours a different approach, and I mentioned above how I've heard that he stays on his backside because he doesn't want to pass on negative vibes. But what we are talking about is merely different management styles - and rarely is a single approach universally successful.