I believe I flew with the captain who was behind that email (or at least one of them). He told me about an approach flown by his FO on a windy/gusty day following a heavy jet. CA noticed FO did not have his hand on the yoke as they got closer to the runway. CA said politely, (paraphrasing) "Hey, it'd be a good idea to hold the yoke considering the conditions. If we catch some wake off the heavy in front of us, it could really roll us and kick off the autopilot."
They got on the ground and the FO immediately went off on the CA, saying his IOE instructor told him he didn't have to have his hand on the yoke, and that the CA had no business lecturing him, and he knows what the hell he's doing, and so on.
Based on my brief time with the CA, he's a great guy and very easy to fly with. He seemed by the book and standard to me, and I look forward to working with him again, like nearly every captain I've flown with.
Moral: Don't be that guy. There's no ego on the flight deck. Always learn, always improve, always be respectful. We get sh*t on too much by our company, there's no need to sh*t on one another.