How else can you improve or be mindful of things in the future if you don't even know what happened or what went wrong?
I sort of feel like the people who don't give honest feedback or ghost aren't trying to protect anyone's feelings or are avoiding conflict. They themselves have something going on internally that bothers them when it comes to giving or receiving feedback. They are maybe letting unrelated previous experiences dictate their current life and decisions.
So now you have 2 types of people. People who want honest feedback and people who never give it. You can't force either one to do the other thing so we're always left with 1 side feeling unhappy.
It doesn't make sense to me that this is how most folks are ok with operating.