Would you say the same thing if I told you the maker of the shirt you are wearing was an unknown worker in China?
In terms of logical positivism, there is no difference between a 'supernatural' being and a 'natural' being that you've never met. It is a faith claim to believe that some unknown person made your shirt just as it is a faith claim to believe God made the person in the shirt.
That doesn't mean either belief is irrational. What it means is that you need to adopt the appropriate tools to evaluate the plausibility of each claim. People can be sloppy in their theorizing about an unknown designer, but increasingly we are developing the tools to more carefully assess such claims. This is because science not only tells us what natural forces can do; it equally well tells us what natural forces are incapable of accomplishing.
To deny this is to deny that there is any rational means of identifying an unknown designer, because if you believe nature is all-powerful then you can never be sure that nature is not the product of any given thing. Which means naturalists have no rational means of claiming to believe in engineers, factories, etc. apart from those they've personally witnessed in action. Such is the absurdity of refusing to reasonably investigate chance, law and design in a balanced manner.
Well thought out and insightful. Bump for you.