I just see that as a sign of legal ass-covering. Companies do not tell you why they didn't give you an offer, because if they do give you a reason, and it turns

I just see that as a sign of legal ass-covering. Companies do not tell you why they didn't give you an offer, because if they do give you a reason, and it turns out to be something that could possibly be construed as an illegal reason, then that could give you grounds to sue them for discrimination.