I think the risk of it turning in a tedious back and forth / rebuttal that you touched on is a big reason in addition to the liability / risk aversion etc.
If you build a bit of rapport with your HR contact / recruiter / interviewers and mention that you'd appreciate feedback either way during the process, realize that maybe it might not end up being a fit now but maybe down the track or that you might have other referrals for them, etc., then in my experience you can actually get some reasonable informal/verbal feedback a lot of the time.
If you treat it as an entitlement and don't demonstrate that you understand their concerns, less so.
If you build a bit of rapport with your HR contact / recruiter / interviewers and mention that you'd appreciate feedback either way during the process, realize that maybe it might not end up being a fit now but maybe down the track or that you might have other referrals for them, etc., then in my experience you can actually get some reasonable informal/verbal feedback a lot of the time.
If you treat it as an entitlement and don't demonstrate that you understand their concerns, less so.