Of course. There are a significant number of fans, worldwide, and of all-ages,
that do not have access to live, video-footage of the games.
It's got nothing to do with a "younger" versus "older" generation thing.
The additional benefit is that, in many cases, the rebroadcasted games also become archived at BYUtv and can be watched streaming again, at any time. There's no need for a DVR. If anything, this model is a new-generation thing - similar to Netflix.