Unless I'm misunderstanding you, your point is that you're only going to support the program financially when they are great consistently (i.e. they were great the prior year and you are reasonably certain they will be great the next year). How often has BYU been consistently great? It depends on how you define great, but I imagine under your stringent definition, you'd probably only concede that its happened one time -- in the 1980s. That's it. So under you philosophy, you'd only be buying season tickets during that time frame.
The point of my original post is that to grow our program, we need as many "die hards" as we possibly can that will help carry the program through the "non-great seasons." Without those fans, there would not by any "great" seasons, because the program would not stay afloat financially through any difficult times.