[amitamit]

As several others have pointed out, the primary reason is the concern/fear of legal liability. All the information is already put together for the Hire/NoHire decision, and the entire Interview Team is usually aware (though this may differ depending on the company).

If you are working with a recruiter, it may be useful for you to ask them - as a Hiring Manager, I shared candid feedback with the recruiter so that they could provide better candidates in the future. Alternately, if you connect with someone in the Interview Team, you may be able to get them to give you "off-the-record" feedback.

Please remember to accept all feedback without getting defensive or pushing back, even if you believe the Hiring Team didn't do the right thing. If you want to set the record straight, it is better to do so in a separate conversation.

[singhrac]

This accurately covers the area: ask your recruiter / someone else you might have met, and unfortunately it's very possible you'll never get a response or get something vague like "they were looking for someone with more experience".

About setting the record straight: you'll never "overturn" a rejection; it would set the wrong precedent for every other hiring decision and also would create a very weird work environment. It's just never worth the trouble. Reapply in a year, many places will give you a totally fresh attempt (which I think is actually a bit charitable).

To echo other anecdata: I've been mildly confronted by previous interviewees who I've rejected and it was always very uncomfortable. The decision is almost never personal, and in one of these cases I actually voted for hire, but was overruled.