Not sure why you think it would be 0%; people have stumbled across $15 million Pollock paintings by accident[1]. William Durkin happened to be at the right place at the right time to save Howard Hughe's life, and it looks like he was at least offered money afterwards[2]. There's plenty of other stories where something extremely unlikely happens and someone gets rich.

The likelihood of winning the Powerball is something like 0.000000005%. Not sure what the odds are of these other unlikely events, but even if they're less likely - you really think someone is able to daydream about a 0.000000005% chance but not a 0.000000000005% chance?

[1] http://www.cnn.com/2017/06/12/us/lost-jackson-pollock-painti... [2] https://en.wikipedia.org/wiki/Howard_Hughes#Near-fatal_crash...

The kind of fantasy you're describing isn't an equivalent good. People buying lotto tickets are fantasizing, amongst other things, on not being dependent on the largesse of others.