Title may be bit confusing but let me explain.
Our existence depends on very small possibilities as a person and as humanity. There are billions of planets without any living thing but there is life on Earth and we consider ourselves lucky.
Similar to birth of humans. There are millions of spermatozoon but one of those form us.And we again consider ourselves lucky.
Do you think this situation can be regard as luck since everyone can think about existence of own actually have to be exists and its impossible to think about unluckiness of nihility (nonexistence) ?