It's none of someone's business why unless you choose to volunteer that information, and needing to know why you've just been turned down is a massive low-self-perceived-status signal.

Contrast this with the institution of the bug report in software. In programming, everyone expects that there are going to be some errors. Everyone learns from them, programmers, current users, prospective users... I consider the social institution of nonjudgmental bug reports to be, in and of itself, a substantial benefit from computer science to society at large.