You must have seen the similar people in world who have exorbitant views about themselves. Everybody, including successful executives has blind spots; however we do not wish to check these blind spots. We create positive or negative impressions on the community due to these blind spots. Most of the times, it is negative, due to unawareness about the SELF.
We normally learn to identify our strengths and weaknesses. But I am not sure, how we try to focus on development areas. When I interview candidate, most of candidates speak about their strengths, but when ask about their weaknesses, it goes very difficult to them to answer. We never try to actually identify these areas.
(Please refer Johari Window to understand the blind spot available on Google.)