I suspect the latter observation is precisely the point. In a world in which the Spurs didn't own the Toros, the calls about those guys would have to be made in relatively short order with relatively little evidence to make the call. By owning the Toros and having some control over how those players develop, the Spurs can closely monitor progress, insist that work be done on particular skills, and evaluate over a more meaningful period of time and series of events.
I'm not really sure why Spurs fans are asking about this. It's not as if the investment has cost fans anything . . . .