You're funny. I grew up going to Arizona games in the 90's. Didn't matter who graduated, how young the team was,
or who was playing. The team was expected to compete hard night in and night out. Youth was never an excuse. In fact, the youngest team we had ended up winning the National Championship.
The same goes for any of the mainstay top 25 programs. Gonzaga had two guys drafted. They aren't complaining about that. They just keep winning no matter what.
Maybe the real question you should be asking is, "Is BYU a good basketball program?"