Who is the "you"? Nothing more than the result of this process... unless you believe people exist metaphysically before having a corporeal presence? In which case you essentially believe in a soul, which is not a very secular belief at all.
It's unambiguously true that no one chose their genes or their childhood environment. That statement doesn't require a metaphysical chooser who might have made the choice.
What's the underlying point you're trying to get across? It doesn't seem like a productive thing to go on about.
> Modern twin studies have concluded that almost all traits are partly influenced by genetic differences.