To be fair, toddlers do the same with their incessant overconfidence, and yet in the end it is that overconfidence that helps them gain skills and achieve great things. Sometime blind optimism is optimal.
This is funny because blind optimism and having a fatalistic attitude are the same behavior. In essence I'm overconfident about a dismal future. You have to be generally unhappy with the way things are going to feel this way, and many people are not, because they got theirs, in their own lives, and have no reason to care.
And this is the trap we find ourselves in. People have no reason to achieve great things outside of getting theirs.