Okay, afleitch, I'm going to get into this in some detail. This might be a little disjointed because I had a glass of white wine and am coming into this religious debate with you straight off a political debate with my great-uncle, but here's a try:
This is only my third Thanksgiving and i've yet to learn that I ought to let the food coma do it's thing!
I don't think what you have argued is disjointed at all. Whether or not my own theory has any traction, atheists still have the easier stance to take by simply saying that there isn't a god. That's all that's really required. If you start to postulate that there is (and I have respect for deism until it starts to structure itself around set concepts) then things become intrinsically more difficult as the world and all it's religious difference attests.
Whether or not my theory has any traction and there is a god, I see no particular disadvantage to me in not subscribing to that belief. If I think of myself, I much prefer people not to know about me than to know about me but misinterpret who I am. Furthermore I would prefer people to not know about me than to assume what my desires are then try to fulfill them in my name. One shouldn't assume a personable creator god is going to hand out brownie points for getting the idea right but not the execution and then create a bigger distance between itself and the people who don't believe that it exists or care to think about it.
So I see no loss to myself in that regard. Part of that is rooted in my own position that I care about myself after my death as much as I care about myself before I was conceived. Which is of course very little (though I am actually more intrigued by the latter)
On the matter of 'plagiarism', I would agree that I cannot say to an individual that it is wrong of them to attest a material interaction with the world as having no 'spiritual' merit particularly as spiritualism itself is not the exclusive domain of the supernatural; one can obtain succour from anything he or she experiences. Why is the act of the refraction of light when sun disappears behind the horizon 'beautiful'? for example? Very recent (as in it's on the interwebs this week) research seems to suggest that viewing things such as pictures of fluffy cats can assist in the learning experience (I'll need to try that!) so beauty seems to open up the pores a little when it comes to acknowledging what is around you. I guess in many ways I have grown to accept that I have quite a 'pagan-scientific' spiritualistic view of the world and my experiences on it without personifying the agents involved. A little digression there. What bad theology can do is to claim for the domain of god the morality of men. It can claim for god the goodness, the nuances, the theatre of human experience, for god as defined by god or given to us by god. That to me also divorces the human experience from the animal experience of which we are family and from which we have obtained many of these values. The tender and selfless love of a parent for a child is not exclusively human. As a 'value' it predates ourselves. Now of course for those who place god right at the very 'start' this doesn't jostle me as much as it would for those who are more literal in their interpretation of humanities beginnings. However what it can also do is to make exclusive to certain deity following humans universal concepts of morality. A believing Christian cannot, comparing like with like be more moral than a non Christian. Being Christian doesn't endow you with anything that a non Christian doesn't have access to in terms of making moral decisions or choices (indeed as practiced by some I feel it can close people off from the human experience by 'moralising' essentially neutral positions but that's a different discussion)That's what I mean by 'plagiarism'; certain forms of Christianity can condition people into thinking that non-Christians have some form of 'deficit' or no basis in their values when those values are often the same and derived from the same impulse.