Battier is a member of the committee. If your argument is that Painter as a committee member can exert favoritism, then other committee members could still do the same. Battier is a Duke alum; he has relationships with that university. To claim without evidence that Painter is doing something improper, i.e. exerting pressure to have a lesser player added to the team, is without any evidence that is the case.
IIRC, Painter has had 4 players on the U-19 team: Swanigan, Ivey, Furst and now Colvin. Swanigan was a First Team All-American and Big Ten Player of the year. Ivey was the #5 draft choice by the NBA. Furst is still in college but is a starter at Purdue. At the u-19, he averaged 7.1 ppg and 4.1 rpg. He was 7th in scoring average on the team of 12. That hardly suggests his spot was unearned.
You are just throwing shade on Colvin and Furst because they are Purdue players. You wish that you had them. You would have been happy to have Ivey and Swanigan.