I think that example better serves my argument than yours. Yamauchi had incredible industry experience having headed Nintendo during its entry and growth of console gaming. He failed because his vision didn't match the way things were changing. A better leader would have been one who listened to his advisors, kept an eye on the market, and adapted accordingly - something you don't need experience of making games to be able to do.This is where Yamauchi failed; he only knew that which had served him well in the past, but when times changed (and thus, the gaming industry business with it), he was out of touch, and too big-headed to realize it.
Heck, we've all presented ideas that we think the console companies should do, yet few of us have experience inside the console industry. Does that mean we should keep our mouths shut because we've no idea what we're talking about, or does that prove that any sensible person can look at something like Kinect and make choices about it without needing experience in electronics or software design?