the deist worldview leads to naturalism which casts doubt on whether or not humans are really valuable, and can humans really know reality and trust their process of thought, and is free will just an illusion.
I sometimes think the argument about free will is poorly framed. I am conscious of choosing. Choices are variously conditioned. Some are, in that sense, less “free” than others. But some are so unconditioned that they are, so far as I can perceive, perfectly free. We can endlessly dissect hypothetical examples. But someone who wants to deny the reality of choice is implicitly arguing that our entire mental life is illusory, which is a philosophical dead end and an argument so patently silly that it will get no traction outside of academia.