In what sense is free will a problem for atheists/secularists, but not for religious theists?

Given that atheists tend to emphasize how our choices are entirely influenced by genetics, environment, past experiences, culture, and other similar factors, how can they reasonably claim that we have free will in anything but the most illusory sense?<br><br>Religious theists, on the other hand, typically have a narrative that the human soul is somehow ‘responsible’ for our choices, and that our choices reflect [insert moral/religious principles here]. However for atheists and secularists, this explanation does not apply, and the best they can manage is appealing to our brain's neurology and the various influences acting on it.<br><br>Therefore, without some kind of metaphysical explanation, does not determinism become a far more plausible explanation for atheists in particular?<br><br>Edit: for clarity I don't intend for this thread to devolve into an argument over which worldview is better, but rather what the best explanation is for human freedom according to different worldviews.