I wish more Theists were intuitive in talking about “Why God at all?” It should be simple. Years of study in Epistemology will all distill to a single, simple fact of the matter answered from another question, “Why do you feel God exists [or doesn’t]?”
The Theist answers “I get the impression God exists”, and then goes about defining God. We can talk about the Atheist response, but it begins and ends with simply adding to that response “don’t”; “I don’t get the impression God exists”.
Being that “God” is a metaphysical proposition, there are no facts for any person to know what “the case with God” is, and so we are left with impressions. Each of us are justified in our respective responses to the question. Anyone arguing other “facts” of the matter of God is not rational to the extent needed in order for someone else who is, to take them seriously. And for the Theist, all of his work is ahead of him, for the Atheist is justified in simplicity; sticking just to the impression alone. While the Theist, also having an impression (in both cases, Theist and Atheist, the impression takes more work to doubt than believe), has to tread carefully about the comprehended “God” he MUST create in order to attempt to describe the incomprehensible God he feels exists. That work, for the Theist, is nearly undone completely and always in arguments that never connect the Theist nor the Atheist. Worse, that some purported connection with his God fails to connect him to humanity and then every narrative he could construct would have no practical end but the effect of even the most devout Theist rejecting each and every one of them. And all of this must naturally exclude from any conversation those holding to “credo quia absurdum”!
Is there any work though for the non believer? Only inasmuch as owning all beliefs must be justified, owning no facts exist to satisfy his perhaps venting appeal to Positivistic thinking that “all beliefs must have evidence to justify them” (which is untrue), and particularly owning that reason itself is not that which justifies his belief “The assertion ‘deity exist’ is false”; given the rational premises of arguments are irrationally accepted on the sole condition that they “make sense” rather than being inherent truth-containers — for rational proofs prove only sentence structures and sentence relations, and some please us and “feel” right where others do not; and of course that it is a trivial matter to produce any logically valid argument for the existence of God, given the premises indeed only need to conform to essentially, syntax rather than actually having any real quality or appearance of “being the case”.
The justification for either believer or non believer is only, and can only be, “it makes sense to me that …”.