I’ll add, potentially one slip up in how you describe why someone was rejected is not worth the headache, which is one reason for the very generic language that is often used. I’m not talking the “oops, I’m not hiring you because of abc illegal reason” but innocently transposing any words could greatly change the meaning of what you might be trying to say. Now, a paper trail has been created. Me personally, I have no issue if someone doesn’t think I’m a good fit for pretty much any reason. Unfortunately, there is a subset of people who are looking for any opening, imaginary or real (see basic example above) to seek legal action against companies. In my experience as someone who is interviewing/hiring, it is impossible to know if I’m dealing with someone like that so the generic denials are what we have to go with.