Veritasium has a good piece for this kind of bias:

https://www.youtube.com/watch?v=3LopI4YeC4I

An advantage that is not "advisable", like being born in january, in a rich country, in an above average family, or just having luck, might have more influence on the outcome than any conscious action. It is almost sure that one-in-a-million level people only edge over the other 999,999 they competed with is just "have more luck".