But Idaho with 2M can't support one team? Also, if that's your argument, the state of Utah is a worse bet than others (since it has to support Utah and BYU).
Actually if you're just trying to maximize local population per P5, BYU makes for a terrible choice. You'd probably go San Diego St, San Jose St, UNLV, and probably New Mexico, maybe Colorado St
Which would be a really bad slate of teams to add