I know a lot of people with the kind of indefatigable optimism and self confidence that leads to success over the long-term. They're almost always failures, they're almost always wrong about intricacies of how the world works, and are blind to the difficulties faced by both themselves, and others.
A select few of them are very, very successful, and in spite of no clear superiority to their peers, their careers go up like bottle rockets with no shortage of fuel.
I don't envy them their success they've usually earned it about as much as anyone else. But I do wish I had the boundless sense of hope and energy they have, and the mindset that it takes to push through challenges like they do.