Well said. I was reading the responses, and seeing the implicit group consensus on what "success" looks like.
The thing though is, your entire life outcome is based on luck. There is nothing you can really do to compensate for that, besides getting back up, brushing the dust of your knees, counting your blessings and keep going.
List of things that are luck:
1) Where you were born in the wrong place at the wrong time. (think Afghanistan, North Korea, Venezuela, etc.)
2) Being born the wrong gender in the majority of the world by population (ie female).
3) Being born with the wrong sexual orientation in a huge chunk of the world.
4) Being born with a health condition (physical or mental), or with a learning disability. Even a mild one like ADHD or dyslexia.
5) Being born to the wrong set of parents. ie. belonging to the wrong community/religion/race... in the majority of the world.
Honestly, even your mental capacity and grit are to a large extent (if not completely) luck. If developed via nurture, you didn't pick how you were nurtured. If nature, you didn't pick the genetic combination you were born with.
So really, what is left? What percentage of your 'success' can you actually take credit for?