That doesn't mean that you'll be able to go to the top games. There will be tickets for the weaker opponents, weird times....
I don't have season tickets, but got to a couple games each year. Neighbors, family and friends often offer up or sell tickets that they can't go to. I like that BYU ticket demand has returned to the demand of the 80s. My parents had season tickets from 1981 - 2015 (when they went on their mission)