It's rare to get an employer to give any honest reason for a rejection. As others have pointed out, it may be for fear of getting sued, but that is only part of

It's rare to get an employer to give any honest reason for a rejection. As others have pointed out, it may be for fear of getting sued, but that is only part of the general reason: Further interaction with the job candidate almost certainly has a negative ROI (return on investment) for the employer. If you tell the job candidate the honest reasons for rejection then at best you've used (wasted?) some time to tell the candidate this. At worst, the candidate sues. But there are many other possibilities: The job candidate gets angry at you for telling them a hard-to-swallow truth and causes a scene. The candidate tries to argue or negotiate with you. The candidate accepts the truth and tries to use more of your time to discuss your original criticism and seek further advice. None of these scenarios are a net positive for the employer.