No I never heard such an argument. But I also never encountered such an argument for atheism, morals, existence of consciousness other than mine, free will, non free will, that someone loves someone, that I didnt only exist since one second, that the sun will rise tomorrow etc either.
Some things cant be proven, so you gotta have faith.
Interesting post, and to a large extent I would agree. However, I think there is a line. When someone's faith in something impacts on someone else in a direct manner, then being unable to rationalise it is a problem (imho).
One of those lines would be the separation of state and religion.
Religion shouldn't get involved in politics and the law.
Though there may be some commonalities between secular state law and religion, like from the Ten Commandments with do not steal and do not murder, I don't think the Ten Commandments should dictate what a person believe or don't believe, or is it wrong to worship more than one god or to not worship any god whatsoever. Or do followers have the rights to destroy religion of another person (TC's do not worship idols).
Another line would the teaching of religious subject in public state schools, in subjects like in science. Creationists (and Intelligent Design followers) wanted creationism to be taught in biology, when creationism (and the bible) is not even remotely scientific.
In Britain, theology and science used to be mixed together. It was T.H. Huxley, not Charles Darwin, who advocate separating science from religion and theology. Science required any statement to be empirically testable or to have verifiable evidences to support it, not mere belief or faith.
To see some Christians trying to force schools teach creationism in science classrooms, is simply one of the line that could impact children education.
If Christians wanted to teach their children, then it can be taught at home, in Sunday school, in bible study, or enrolled them in one those church-run schools.
Yes, there are some lines need to be drawn.