You made me look some of this up. I'm reading that neither Collison or Hinrich ever appeared to be interested in Iowa.
Kansas, Duke, Purdue, Arizona and Michigan are among the schools recruiting Collison, and in that company, Iowa State normally wouldn't stand a chance. Yet Collison is keeping the Cyclones on his short list. - Chicago Tribune, 7/14/1998
And Hinrich was committed to Iowa State after his sophomore year but began looking at Kansas, Oklahoma and Kansas State after Tim Floyd left for Chicago.
So how did Iowa lose Hinrich and Collison when it sounds like neither were ever interested in going there?