How is it irrelevant?
Given the mystery of the Universe, if Deism is irrelevant- than so is Atheism. Only Agnostic views on the god question are then TRULY 100% relevant, since a deistic god cannot be proven nor disproven{as of yet}.
Plus, Deism evolves. I am aware of arguments for example that the Universe just ALWAYS WAS, or that it bubbled off from another universe{multiverse theory; which by the way is still theoretical itself; I personally believe it probbale, but it's still theoretical}; however, the marriage of Deism to Pantheism and Panentheism has done wonders for this philosophy{PanDeism and PanenDeism} when it comes to these arguments.
Fact is{as far as we know thus far}- either the Universe was created from a big bang, spawned from another universe, or just always was{and always changing in form; same amount of energy constant}. None of this discredits the deistic theory.
I always say, Athiests and Deists are at a stalemate; snce the evidence supports both propositions as equal probabilities, but neither is disproven, neither goes directly against evidence and sound logic[well, unless a perceptive Agnostic wants to chime in and point out how both Deism AND Atheism are unproven biases, ie: "reason-based/skepticism based/minimal/weak/soft- FAITHS; and I encourage them to do so, because as mcuh as we Deists and you Athiests hate to admit to having "faith"- beeing a dirty word to us, it's intellectual dishonesty for us to not at leats admit to "weak" faith or a reasoned-belief; and yes, Atheis IS a "belief"- it's a belief that NO GOD EXISTS, PROVE IT is all I have to say to the Atheist! You cannot, neither can i prove a deistic first cause source or force, but both our positions are equally valid given what we know and what mystery remains}.
The Cosmological argument has not been broken{disproven}, it's merely had to go through reformation, or re-deifinings; as it currently stands, the cosmological argument is currently if not on exact equal footing with the universe always just was- than it's pretty close; because we simply DO NOT KNOW YET.
But, the evidence for order and design in the chaos is there, it's just a matter of perspective{does this PROVE a deistic "god"? No, it does not; but it makes the belief that such an intelligence exists a valid belief}.
Lastly, I will say this; Deism is irrelevant in in the practical sense; I mean, why worship this "god" or whateve the heck you wanna label it? What meaning does this belief really have? Isn't the belief itself irrelvant to life as is?
SURE, perhaps{perhaps not, I guess that's a matter of perspective}; myself -I'm functionally more anti-theist and agnostic, but my intellectual viewpoint is still deistic; the relevany or irrelevancy of this "god" and the argumetns for it don't really matter; even if it is "irrelevant" in the "practical" sense, that so-called "irrelevancy" does not DISPROVE the viepwoint; if it exists and irrelevant, so what? the evidence for it's existence si still there, and it would be intellectually dishonest of me to simply become an Athiest out of reactionarism when the deistic hypothesis makes perfect sense to me, and ir relevant philosophically.
Thanks
In Reason:
Irrev.Bill