Yes, but what I'm saying is that those who shine brilliantly academically, are, well, in some cases, academic, not necessarily marvellous teachers. As I said, I have no idea how this reflect statistically nor do I have anything but anecdotal evidence to back up my statement. But, for example, at college, we had fantastic physics teacher whose brain simply worked on another level, he wasn't a people person, couldn't control the class however I have no doubt about his intellect. Similarly, at university, a well established academic, excellent peer reviews for his journals, but was crap at verbalising his work and subsequently crap at teaching complex topics to an audience who needed gradual introduction to such topics.
That's the nature of the beast, any beast, in that you will get those more suited to a role or position than others. Equality or parity in skill sets are desirable but also an improbability. I generally agree though.