Exactly this - I am trying to think through the implication for me personally. There aren't quite micro-towns where I am yet so maybe just a place outside of the city centre?
What evidence do you have that this isn't true? It's not really a falsifiable position (since nature vs nurture is hard to show) and free will hard to measure.
To me, it simply seems more convenient for the audience to believe free will doesn't exist and addition is genetic.