Art is not designed to be viewed by artists alone. If you are not willing to take critique from everyone who views your art then you might as well never show your art to anyone.
All artists want to sell work, and the majority of people who buy are not artist themselves. They are your target audience and the people who will judge your work the hardest, because it is them who are paying you. If you want to stick to per to per selling then good luck, you are advertising yourself only to people who can do what you do already, and probably do it better.
I think people tend to get the deffinition of critique wrong quite a lot. Critique does not meen to correct. It means to analyse, a synonym would be to review. Just like movie reviews, or book reviews. This is very different to going someone a list of artistic alterations to make.