Honestly as someone who is looking for a junior role this could not be further from the truth. I just want to know how to improve so I can stop being unhappy at my current job and get a new one.
I've been interviewing candidates for more than 15 years (for PhD /RA positions and then for Engineering) and every time I've given honest feedback, candidates just get into an argument on why they think the feedback does not apply to them...
It is just not worth it. If I want to know how am I at certain skills... I test myself in a less "charged" environment.