There are potential explanations (even if some people won't believe them).
Optimists have a tendency to make lemonade out of lemons, and to then see the glass as half-full rather than half-empty. It's an admirable quality, one that can positively affect mental and physical health.
Think you don't believe in magic? Think again. Our brains are designed to pick up on patterns: Making connections helped our ancestors survive. You're not crazy if you're fond of jinxes, lucky charms, premonitions, wish fulfillment, or karma.