Fair enough, and I don't doubt that to be the case.
What I have a bit of a problem with is terms like "hit", "bust", "elite", etc.
They are not clearly defined terms.
If you say SEC receivers are, as a whole, safer bets not to be disastrous than other conferences, I would say that's probably true. It is also probably true of many other positions, as they get the athletic cream of the crop, and their academic requirements are not as rigid as some other conferences. I would also say, outside of a couple other powerhouse programs, SEC coaching is probably as close to NFL level as the college game gets.
In reality, the SEC puts more players in the NFL than any other conference for the reasons mentioned. They are generally better athletes and football players to begin with. It isn't really any surprise they they end up statistically better. That still, to me doesn't tip the scales of value for exactly that reason. Less chance of "bust" coming from a top SEC program, as opposed to the entirety of D1, I agree. Less chance than say another top program like Ohio State (and I loathe them)?, Clemson?, Michigan? IDK about that.
All of that to say you still have to evaluate the individual, regardless of the school. The level of competition faced can't be ignored, but I also don't give extra credit for simply being an SEC player.