That isn't true at all. Again, the SEC has produced more NFL draft picks almost every year for the last 16 years. And from 98-13 Alabama won 3 titles, LSU and Florida 2 titles each, and Tennessee and Auburn 1 title each. The Big 12 and ACC are the only other conferences with more than 1 national title in that time frame, OU and Texas each with one, and FSU won 2.
You cant take Bama out of the equation. For one, it would be changing the conference and the argument. Take Oklahoma out of the Big 12 and what does it look like? Take Clemson out of the ACC and what does it look like? But secondly, you don't know what the situation would be if you took Bama out of the equation. Those recruits are going somewhere, so Florida, LSU, Georgia, Auburn, etc might have ended up being what Alabama is currently. I mean hell, Georgia certainly might have multiple national titles if not for Alabama. You cant argue hypotheticals.
I also think the death of the SEC is a bit premature. Yes they had some rough losses, but was anyone expecting UT to be good? Everyone knew Ole Miss had major question marks on offense, etc etc. The top tier teams all won, and I think the SEC still has more top tier teams than any other conference.