What we're doing with AJ carries risk too.
This is a gross oversimplification, but the NCAA blue bloods generally either follow:
The Kentucky model (largely freshman team of elite one and done players), OR
What we might call the UConn / Kansas model - tems built with highly rated recruits but NOT highly rated enough to be one and done - guys that spend 3 or 4 years in college before making the jump to the NBA. Said differently, their juniors and seniors beat Kentucky's freshman.
I think Kentucky has proven that the one and done model is a really tough way to win.
But that's not what BYU is doing. We may have one or two "one and done" players like AJ or Egor, but the rest of the team is a lot of seniors and juniors.
If we do get to the point where we have like 3 or more one and done starters I'll get worried about our ability to win championships, but lets be honest we're not winning any championships as is. The Kentucky model would still be a huge upgrade for us, even if it leaves us behind Kansas.