Nobody here is talking about what the players do in the NFL because they are interested in following them in the NFL or as ways to measure the success of those programs. The entire purpose of that part of the discussion is as it pertains to how much talent programs have, which doesn't always correlate to wins. Some people get more out of their physical traits than others. This discussion isn't even close to being about counting former GT (or any other college players) player in the NFL as a measure of the success of our program. However, the better the players you have on the field in college the more likely it is for you to win football games (and of course it should go without saying but I'm saying it anyway because if I don't then people will immediately say something about it; you MUST have good coaching to take advantage of that talent or it really is moot how much talent you have, so you need both good players and good coaching, not just one or the other). And ONE of the measuring sticks, not the only one, of how physically gifted the athletes are that are in your program is how many of them go on to play in the NFL. And of course there are plenty of great college players who do not go on to play in the NFL or who do but flame out early. I don't think anyone would argue with me when I say that Joe Hamilton was the best college football player in 1999 but his NFL career wasn't really indicative of how great and dominant he was in college.
My point is that looking at how many players go on to the NFL is ONE measurement of the talent that you've had coming through the program. It's not the only one. And it isn't a measure of the success of the program, either.