As Bobby Boucher said, Mama's wrong again...
Don't trust me though, let's look at the plays.
Bama vs OU: OU's TD passes are at :12, :45, 1:42, and 3:10.
https://www.youtube.com/watch?v=utrRNVv9Cms
:12 - Collins is looking at the QB, just misjudges his jump and misses the ball.
:45 - Ha Ha is looking at the QB and has great coverage. Ha ha reaches out and tries to defend the pass, but the throw is just a perfect pass and out Ha Ha's reach.
1:42 - Belue turns around and looks for the ball at the about :12 yard line and gets smoked. This is the textbook example of getting out of phase.
3:10 - OU's QB extends the play and throws back across his body and Collins is standing in the end zone watching him. The WR comes back to the ball and makes the catch.
Not TD throws, but notable.
2:48 - This is the kind pass completion that you are complaining about (and the kind you seem to remember the all TD passes being). Jarrick Williams never turns his head, but he it is 15 - 16 yard pass completion.
3:00 - Eddie turns back to find the ball, but gets beat for a 40 yard completion. Once again, not seeing the ball IS NOT why he got beat. There's a reason Eddie is playing Safety this year.
None of the big scoring plays are the kind of pass you and others are saying they are. The DB saw the ball on every play, but they just didn't make the play. This myth that all you have to do is turn your and you're good is just that - a myth. The DB has to maintain coverage and actually make the play.
Bama vs tOSU:
https://www.youtube.com/watch?v=3pX2i8tpgGk
OSU's TD passes are are at :16 and :41
:16 - Cyrus is looking at the QB, gets his hands up and tries to knock the ball down, but can't get there.
:41 - Eddie starts to get beat in the route, he turns back to look at the ball, and falls down.
Once again, 2 more TD's, and neither of them were because the defender just didn't turn his head and see the ball. Counting the 2 fluky OM plays (the play that defense had an opportunity to INT and the other illegal play/blown coverage pass) along with OU and tOSU TD plays, that's 7 of the 12 TD's you listed that WERE NOT the result of " the receiver catching the ball behind the secondary who never turned to find the ball" as you keep saying.
I do hope that you are correct about one though. I hope and pray Treon Harris throws the ball at Cyrus 25 times!