Why is optimism so hard?

Why is Optimism such a challenge for so many people? Could it be that the constant barrage of negative news and headlines we're exposed to daily is wearing us down, making it harder to maintain a positive outlook? Or could it be something more deeply rooted in our psyches, like a fear of failure or a lack of self-confidence? How can we cultivate a more optimistic mindset in the face of adversity and uncertainty? And what are the potential benefits of doing so, both for our personal well-being and for our financial and professional success?