A lot of this "luck" can be traced back very easily to causes like "had two parents who gave a damn" or "had enough to eat eat growing up." The people pushing this narrative that you're not really responsible for your failure / success want it both ways. They want to make you admit that you benefit from living in a peaceful stable society with infrastructure, while also not wanting to hold parents accountable for having too many kids too early, or admit that impact that divorce has on young children. It always comes down to pushing some narrative that is meant to justify further state intrusion into our lives and the dismantling of the family unit, all with pseudo-scientific (see "the gray sciences") justifications and emotional appeals. Spare me the bullshit, I aint buying it.
EDIT -
Looking for another example of this obvious propaganda? Try the latest episode of RadioLab:
Though this is really just giving people the opportunity to down vote me twice, I feel the need to expand on this:
The war on self-determination, and promotion of the notion that you're not really responsible for your lot in life is an ongoing narrative. Basically the introduction are always the sanest arguments: There's a history of racism / sexism that people are still struggling to overcome. The benefits of having a safe society with infrastructure. Of course the implications they then allude to are that if you question the wisdom or effectiveness of any particular conclusion or prescribed policy they advocate for, then you are racists and hate public roads (this should sound awfully familiar to any libertarians). Also the hypocrisy of saying that others are just ignorant of all the hidden things that helped them succeed, while also ignoring things like single-motherhood and having large numbers of children as being obvious causes for failure (both for the parent(s) and children) is particularly glaring.
What it comes down to is basically not wanting those who succeed to feel like they are in any way superior to others, by giving all credit to institutions that the modern neo-marxists (who now call themselves progressives) support (such as public school systems), while also not wanting those who fail to feel like they are in any way inferior to others, by giving all credit to institutions that they dislike (like law enforcement). Also the benefits of institutions they dislike are also completely ignored (family, religious communities, etc...)
Make no mistake, this is a lie meant to justify stripping you of your individual freedom by asserting that you are not in fact an individual capable of any sort of self-direction, but a predictable causal robot of the society in which you live. The continuing inability of the social sciences to make reliable testable claims is merely in an inconvenience to their demographics as destiny mentality. That such an ideology, which attempts to shackle you to easily sorted "identities" bills itself as transcending these barriers, is some sick form of double think that is now spread as gospel by public educators (the priestly caste in this faith that refuses to admit that it is one).
I urge those of you who are have children, and are concerned for their well-being to make sure you expose your children to the insanity of this philosophy in the same way that you would seek to vaccinate them from the virus of religious BS. Because make no mistake, if you don't tell them about it with the appropriate criticism and skepticism, others will do it for you, but in an attempt to sway your child to giving up their self-determination to a nanny-state, and embracing a perverse view of justice called "social justice" where the individual reaping what they sow is of no consequence, and all that matters are peoples not people.
I recently saw a very enlightening video on the subject of individualism versus collectivism that somewhat echoes your thoughts: https://www.youtube.com/watch?v=sNB38U04sNM
EDIT -
Looking for another example of this obvious propaganda? Try the latest episode of RadioLab:
http://www.radiolab.org/story/radiolab-presents-media-busted...