[po8crg]

The circumstances of your birth are luck for you.

They are not luck for your parents but you are not your parents.

One of the problems here is that there is one position that everything is either the result of my decisions (ie under my control) or it is luck (ie it is not under my control) and another that defines luck much more narrowly.

Anything that happens to you as a result of someone else's decision is luck for you, even though it's a controlled decision for them. And you had no control over your conception because you didn't exist at the time.

Or, to put this in the simplest possible terms: "other people's free will is your luck".