As a hiring manager making a fairly low volume of hires annually I always told the candidates why. I also did this in all F2F interviews. If the candidate didn’

As a hiring manager making a fairly low volume of hires annually I always told the candidates why. I also did this in all F2F interviews. If the candidate didn’t make it, Id tell them and then take them through what we thought and why they didn’t make it. Some candidates were outraged — they thought they did fine. Some would fight back and start clarifying stuff and then you’d have to start clarifying stuff and so on. Some would be very grateful. On the balance I believe it to be the ethical option since you’ve just wasted an hour or 10 of someone’s time, and if they want to improve outcomes you’ve made available the information to take or leave. I also kept artefacts documenting the hiring process for every candidate — both for future managers (who invariably didn’t care) but also for FOI requests or complications. Personally I think hiding information and being guarded for fear of legal troubles is a slippery slope to less trust and more legal trouble.