As an AD you need to be able to do the math, predict wins of other teams 2-3 years in the future, and have the networking skills to get the right teams to play you. And that's just for your football team''s schedule.
I assume you just meant this as a generic statement?
Unlike LancerDad, I do know our AD. I assure you he has the necessary math skills, and is as clairvoyant as anyone could be when trying to predict how a football team will perform one, two, or three years down the road.
What you did not point out is, that to a large part, it is beyond the ability of a lone AD to schedule an opponent. First, you have to get a response from a team that you place an inquiry with. A good 50% of the teams reached out to never respond back. Not in just our situation, but in almost every AD's situation. Of the other 50%, most of them have no interest. The few that want to schedule a two game cycle have to see if they can, A). Get the blessing of their Coach, Principal, and in some cases, their school Superintendant, and then B). is there a date in both schools calendar that will work?
Most never realize the work that goes into something that sounds a simple as finding three OOD opponents, (three games in our particular situation.)
Another thing that often occurs is that of simply maintaining a scheduled cycle with a school as a favor.
School A wins 8-10 games a year, school B is fortunate to win 1-2. Sounds like exactly what neither team wants, correct. But, when team A starts looking, nobody wants to schedule a team that they will probably not be able to beat, and team B starts looking and the unsaid thing by potential opponents is, "we will get virtually NO points from playing them". Both AD's are intimately aware of each other's difficulties. And maybe team B agree to play team A a few years ago when they couldn't fill a date? So you don't just kick them to the curb.
The bottom line? It's not as simple as just saying "we are going to play team XYZ next cycle".