There seems to be a general trend to avoid explanations in a lot of areas. For example, you often get no feedback after job interviews. Google just canceled my Drive subscription after 10 years without telling why but they offered me to sign up again. No idea why and support wouldn’t tell. How are people supposed to learn and improve without knowing told what they did wrong?
With interviewing I think it's a bit different. At least in my mind it is. As someone who has interviewed people over the years, I don't give feedback because of the way nearly all human beings operate. Specifically, if I were to tell someone, for example, that they came off as abrasive or based on the things they said in the interview it sounded like they were a bit too controlling or possibly micromanaged previous…
The actually-good end up having to do precisely the covering-up you mention, because genuine and entirely fine attitudes and behaviors are, in interviewers' imaginations, often magnified to their worst possible extremes. It's very valuable information for a good employee to have that they need to cover up or avoid certain things in interviews that aren't actually a problem, because they do need to do that, and they may not realize how things that they think aren't a big deal and in fact are not are coming across in an interview context.
I write this as someone who is, I gather from feedback, pretty decent at that part of interviewing. Doesn't make it less gross-feeling and stressful.