Look at the Loyola PG last season (who was white I am pretty sure and I know that matters so to some around here) - he couldn't have been more then a 3 star, maybe a 2? He'd probably play at Iowa but likely didn't have any offers close to that.
We don't even have to look that far to see the benefit of getting one of these 3* guys...Anthony Clemmons was ranked #315 nationally. Barely a 3* on 247 and a 2* on ESPN. I bet Fran would have killed to have him on the team. Even as a freshman Clemmons was a valuable contributor.