E-S, you are touching a very important subject. Our belief in God is entirely based on our "spiritual eyes". Yet we also live in some observable reality, and if we want electricity, nuclear energy, antibiotics, cancer cures et caetera, we also have to use our material eyes, eyes and microscopes. What we see with these material eyes is not reconcilable with literal interpretation of the Bible, and the attempts ('creation science') cannot stand elementary critical scrutiny - you guys just demand that we flush not only biology, but also mathematics, physics, chemistry, geology etc. down the toilet. Now, do you have any SERIOUS suggestion how we can make the world our dominion (Genesis) while locking ourselves out in the purely spiritual reality of Bible and prayer? Mainstream Christianity found a solution (several hundred years ago, actually), but you obviously don't like it. So, offer an alternative.
Partly yes, and partly no.
First, nuclear energy, electricity, physics, and mathematics do not in any way challenge our spiritual knowledge, so they are not relevant to the question.
When you get into cancer, and antibiotics, its a very different story. Antibiotics are shortening lives every day, and their use is in defiance of God's word, which tells us the "herbs of the field" and "every green leaf" are provided for our health, and they definitely do a good job. Cancer 'cures' do the same as all the other drugs. Sometimes there is remission during treatment, but in the long run the treatments shorten life, even in those that experience remission. The real cure for cancer is to remove the original cause, which in the preponderance of cases is a spiritual issue. (bitternewss, hatred, unforgiveness, blaming God, or any other form of 'toxic' thought) Some illness is due to use of chemicals without regard for the effect on the body, and some cancers fall into this category, but the main rule still applies: remove the cause.
What you call "mailstream Christianity" bears little resemblance to what is described in God's word. I don't mean to attack any particular denomination; they're all in deep do-do, and we are at the point announced in Revelation where we are told to "come out of her" referring to the "harlot" that organized religion has become.