I think for the most part this is true. If the things we can clearly see in front of us contradict what we have been told to believe then the chances are something is wrong.
That said, there are clearly examples throughout Scripture where a degree of blind faith was required. We see Elijah asking the widow to make him a cake, and her oil and flour never ran out. We see Ezekiel in the valley of dry bones, prophesying and watching them live. We see the Israelites leave oppression under Pharoah and walk out into, well, nobody knew just what beyond the fact Moses said it was a good idea.
Part of my concern with some of the more far-out concepts of "faith" is that they take a snippet from Scripture (such as the one psalms91 posted) but then distort the context such that it turns into a blind faith with no basis in reality whatsoever. It may be that God will ask us to take a step of faith, and it may be that God will only give us glimpses (and maybe not even that) of where the path ahead leads. But God knows our failings and I'd put money on God encouraging us to take small steps of faith before the huge leap into the dark appears.
Of course a part of the issue is that, in many ways, Scripture is silent. It tells me what I need to know about God but doesn't tell me details of what God might have in store for my life. It gives general callings (e.g. "Go into the world and preach the gospel") but "the world" could mean the other side of the world or it could be the housing projects a couple of miles away. "Love thy neighbor" applies just as much to my literal next-door-neighbor as it does to the guy in the seat beside me on the plane if I'm flying abroad. So in that regard it's entirely possible, even likely, that the best I can do regarding testing what I think is a calling from God is to confirm it is consistent with the general character of God - Scripture alone may be able to demonstrate that the "calling" is not from God but probably can't definitively say that it is. To take a silly example, if I feel led to start a relationship with my secretary it doesn't take very long to find verses in Scripture that make it clear such a "leading" is not from God. On the other hand if I feel led to become a missionary to Bolivia there isn't a verse in Scripture that will specifically tell me whether or not I am right.
My issue with those who encourage a totally blind faith is that quite frequently the "faith" is little more than wishful thinking, or a faith in something other than God. If they bring me a "word from God" and encourage me to have blind faith in it, what they are asking is that I put a huge amount of faith in them, rather than faith in God. If the message is truly from God, God is quite capable of confirming it in some other way - God knows what it will take to convince me it is him speaking rather than the ramblings of a self-proclaimed "prophet". Likewise "the hope of things unseen" might be the hope that, one day, a gleaming new Lamborghini Huracan will appear on my driveway. As a rule my understanding is that before such a thing happens I need to do my part (specifically hand over something north of $200,000), and to insist that I have faith that my new Lamborghini is on its way given I haven't done the "handing over money" stage is to do little more than deny reality. Yes, it is theoretically possible that God will follow up the first chapter of Genesis with a proclamation "Let there be a gleaming black Lamborghini Huracan on tango's driveway" and see, as I'm sure I would, that it was good. I just wouldn't hold my breath waiting for it.
I think the bottom line is that we should be wary of a "faith" that requires a total disconnect from reality - while God may call some of us to demonstrate such a faith the chances are most of us aren't going to be praying for fire from heaven. The hope of things unseen can describe our place in heaven as much as the things we might like to see on earth.
