I would suspect this is more about "other events" than UNLV football. The Colts and Cowboys (and soon the Vikings) have redefined the word "expensive" when it comes to stadiums. But eventually someone in Vegas is going to break all of the records and build the guadiest sports facility in the world, complete with a casino and hotel suite balconies over-looking the field very near the strip. And the facility will host everything you can think of (probaly even an NFL team marketed to Californians).
UNLV's field will be economically obsolete if they are not a significant partner in this project. They become a tenant of an eventual Vegas NFL franchise. And we know how that story ends.
By being the first to talk about it, it increases the likelihood that any such future project is built more to UNLV's needs.