I didn't hear the podcast.
It does. There are no wilting flowers in the NFL. Someone has to take charge. Much was made of Eli taking over the huddle AFTER Barber and Shockey were gone. He wasn't the Alpha Male of Alpha Males because they were there first and he had no idea how to take charge.
I think guys who weren't as skilled are often more educated in the ways of the game.
I don't know if it was the primary difference but it does make a difference. All obviously had the physical skills but there's a mental side. And, of course, the intangibles you mention. Also, proper systems/coaches make a big difference.
All three of them were destined to fail because, IMO, they're dumb.
I heard something along that line this morning. I haven't bothered to see if my sign changed. I'm sure it makes no difference in who I am.