My takeaway from the Brady/Cowherd clip was that there are a lot more terrible OCs and QB coaches in the NFL than just a few,
Given that he said we should rank them 1-32 just like we rank QBs, I think he was hinting that the curve probably looks the same i.e. top quartile really good, bottom quartile really bad, and a whole lot of mediocrity in between. Talent is probably the classic bell-shaped curve (for those who math, a Gaussian distribution), like many other things are..
In turn we I think we can say that those who do not get that top quartile level coaching are at a huge disadvantage to those who do. To me that's the exact point Brady is making in that video.
As for Brady himself, we're all free to re-tell the legend how we see fit, but the bit that always sticks with me is:
I've seen the video clip where Brady himself tells this story, but can't find it online now so the text comes from this:
By Pat BradleyTom Brady went from sixth-round afterthought to arguably the greatest quarterback of all time, and it’s generally presumed he did so with an everlasting chip on his shoulder.While that last part seems to be true, it’s apparently not the chip we all thought it was.It’s...
www.foxsports.com
IIRC the way Brady tells the story is that the coaches were doing an evaluation at the end of his rookie year, they stepped out for a second, he read that note about himself and it hit him that what he was doing wasn't cutting it, and he needed to kick it into high gear or his ass would get cut. This is right before **** Rehbein passed away and he then got those 1-on-1s with BB.
Given our context is the development of QBs and MJ in particular, my point is that QBs take time to develop and even Brady didn't show up as a day-1 starter.
I think the development we saw from his own admission that at the end of his rookie season he was marginal to being ready to taking the reins when Bledsoe got knocked out to winning SB36 then SB38 and SB39 is definitely due to his talent and his hard work, but IMO we'll never know if it would ever have happened if he didn't read that evaluation of himself, or if he didn't get the 1-on-1 tutoring he got from BB after **** Rehbein sadly passed away.
I don't think it was pre-destined that he would kick it into high gear, and that he would have had the coaches around him that enabled that to happen. Again, I think this is what he is telling us in this video.
I had a similar life experience. In middle school my evaluation earned me a demotion in math from college-level to 'math for idiots'. I sat in class for a year being pissed off about it, then from that point on I had that "I'll show you" chip on my shoulder. But the main thing was that once I did bear down I saw mathing wasn't as hard as people made it out to be, and if you put in the effort you'd get the reward. I rode that pissed-off energy till the point I ended up with degrees in electrical engineering and computer science, and beyond.
Personally I don't think TB12 himself knew there was a higher gear till after he got that evaluation and till he learned 'the answers to the exam' from BB.