I guess the greater question is why are we superstitious? It's not just sport fans who may wear lucky underwear but even job seekers may want to bring the luck before an interview by only taking right turns on route to the interview.
Psychology Today states: "We may not even be fully aware of the many little rules that we follow in order to ensure that life goes the way we want it to." (https://www.psychologytoday.com/blog/fulfillment-any-age/201410/why-were-so-superstitious)
What little things do you do to ensure life goes your way?
In the meantime, here's a poem about being down on luck and hoping for better days:
