I agree with the fact that not getting any feedback (good or bad) hurts people in the long run. Having feedback and either improving in those areas or adjusting how you approach them would help people and if you don't know their an issue how can you improve them?

I've sent previous interviewing managers questions asking what I can improve when I didn't get a job this year, and none of them returned my e-mail. Very frustrating, especially if you're someone who would like to improve themself!