Why? I do agree that it is important but if i do not follow on the feedback then I won't be able to make great maps. You guys know best so I have to follow on the point so I can have the great map.
Feedback is simply that. It's feedback. It's what other people think, not what you should strictly do with your map. Learning how to map is a huge learning curve and part of that is figuring out how to interpret feedback, apply that to your existing map and make changes that will help address whatever was said in the feedback.
This is how development works in the real game industry, when you work as a level designer you have to understand how to interpret feedback you're getting from QA/testing, other developers, artists etc. and apply that to what you're working on.
In many cases level designers are so well versed with what they're working on they sometimes don't even need external feedback, and they can generally do things by themselves without many problems. But in any case, it's still extremely useful to get feedback, and actually use it to fuel your mind, rather than to tell yourself what exactly to do.