Reasonable Evidence

Neither Naturalism nor Deism are conclusively provable. There are, however, vast amounts of reasonable evidence for Deism, while Naturalism is mostly failed attempts to dissuade Deists.

On a purely intellectual basis, given the great extent of what's still unknown, atheism vs theism is essentially pessimism vs optimism, which is a choice. In the spiritual arena, when considering the elements of all available faiths (Buddhism, Christianity, atheism, Judaism, Hinduism, etc.), none of which can be absolutely proven, why wouldn't you choose the faith offering the greatest hope: new life  in Christ?