Discomfort can be good, if you recognise it and use it appropriately. Oftentimes, we don't listen to others or reject their point of view not because we've considered it and found it to be lacking, but because it makes us uncomfortable and we don't want it to be true.
Human beings are geared to react evasively to pain and generally this serves us well - when we touch the hot stove and it hurts, we back away. When we cut ourselves with the kitchen knife, we learn to be more careful. This reflex, however, tends to fall flat on its face and be counterproductive when it comes to receiving advice and guidance from others, or working through "tough stuff" in interpersonal relationships. Rather than sticking out the tough stuff, we turn tail and run...often cutting off our nose to spite our face!