I think most people would like to believe that the ultra-successful received some good fortune at an early age that the rest of us will never have access to. This belief creates a mindset that success will never happen to them. From this mindset, one expects to fail rather than to succeed. And the excuse for not succeeding is always the same. You simply did not have the opportunities given to those more fortunate.
In reality, I believe the opposite to be true. We all have opportunities to grow and become successful, but not everyone recognizes them. Because these opportunities look like obstacles blocking our path. Some see the obstacles and know that they can be overcome with a little diligence and hard work. This creates the daily opportunities that those with a failure mindset will never see.