You could also consider luck to be our sampling bias of only taking into account the successful outcomes. The population as a whole that is attempting to deter

You could also consider luck to be our sampling bias of only taking into account the successful outcomes. The population as a whole that is attempting to determine the 'next big thing (tm)' does the majority of the sampling (with a small amount of resampling from those who manage a second or third try). We then read the stories of the successful outcomes and call it luck.