We are surrounded by humans with a different mindset. Some as cheerleaders, collaborators, believers while few others as naysayers.
It is important to rationally approach inputs of naysayers. It should not be discarded. They are the ones who will give you inputs which you would not have expected from your dear ones.
Seeing the feedbacks and rationally analyzing over it helps. Being emotional or being egomaniac will add up to your blind spot.