You mean, of course, your 6-2, 225-pound QB.
But, you see, the coaches weren't making the decision to play or not play Joel because of his previous week's five touchdowns. The decision was made based on that day's opponent. The coaches looked forward, not backward.
Texas Tech's defense is likely the Big 12's worst, WVU's defense arguably is the league's best.
Does your coaching background prepare you to analyze the performance of WVU's defensive individuals, the unit's schemes and tendencies, and how well iSu chose to attack those individuals, schemes and tendencies? Without that knowledge, shouts from the stands saying, "Put in Lanning, you dummies!" do not ring true.
The coaches know far, far more than you and I do about the game of football and about WVU personnel and capabilities. Do you dispute this statement?
Coaches make mistakes, and those that are so obvious to the football fan sitting in the stands will be commented upon. But the details of the game, the nuances, sail far over the heads of we common fans. (And, I have an anecdote that, in my mind, is proof of that claim. I'll post it if someone wishes to read it.)