there is no such thing as luck or random.
reality is a chain of causation. if someone is successful, it is the intersection of the person and the causes and conditions in their life. and the continuation of such.
if something happens for which we do not possibly have all the relevant data to predict it, we call it random. but, a dice roll is unpredictable only because we don't have all the information pertaining to it, or weather that predicts more than a few hours or days.