Playing along with shit about a mythical being to entertain children is just bit of fun. so people happily do it, as adults we all know we're doing it and play along, it's a carry on, same as the ghosties at Halloween.
Corruption in football isn't the same as entertaining children about a mythical character, be it Santa, Easter Bunny, or the tooth fairy. I'm supposing you were being facetious because it's not the same as rigging sports events where it's not a societal expectation to play along in a harmless activity where society creates a bit of fun for children.