It's called 'feedback' because it's feeding information back to you.
Ever have someone in one of your fandoms who is just completely oblivious to tactfully worded advice? Someone who dutifully sends out five or six paragraphs of their hopelessly bad action adventure epic to every! single! mailing list! in the fandom, complete with gushing thanks for the feedback from her 'fans', when all that feedback is from just three people? Two guys who feedback every chapter with 'great story!!!' and one poor sod trying desperately to find a nice way to say 'OMG, get a beta reader!' and 'Fifteen paragraphs of exposition is a bad way to begin a story' and 'Don't refer to your protagonists as The Blonde and The Brunette, particularly if they're men'.

And when someone finally sets out in clear language all the ways in which this writer could improve, they reply with a 'thanks for the feedback' message and continue on their merry way, posting yet another piece of unreadable dreck. *headdesk*

Back when I was starting out, I was a BAD writer. Horribly bad. Really really awful. You know what helped me? Someone being completely honest with me. My beta readers helped too, but they were friends. This woman wasn't my friend, and wasn't interested in being my friend. She just didn't want to have to read the crap I'd written. So she told me exactly what I was doing wrong. And while that stung a little at the time, it was all good advice, and I am very grateful to her for passing it along. I have never enjoyed being ignorant, and have never refused to learn a lesson because I didn't like it.

I guess this sounds like a 'why can't everyone be like me?' rant, but it's really more of a 'why don't people pay attention?' rant.