We believe that our physical life is a test of our faith. It was never intended that the physical evidence of the Book of Mormon would be the thing that would bring conversion. It is only for those who are willing to diligently search, read and pray to God and ask if it is true.
In my opinion “blind faith” is an oxymoron. The only time there is blind faith is when there is no faith. Faith is seeing into the spiritual world:
"Therefore we are always confident, knowing that, whilst we are at home in the body, we are absent from the Lord: (For we walk by faith, not by sight).” (2 Cor. 5:6-7)
In the physical world we see through our eyes by the light of the sun or other forms of light energy. In the spiritual world we see through faith by the light of Christ.
“Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.” (John 8:12)
In the physical world we discover truth by observing with our physical senses or though seeking physical evidence. However, we are told in Hebrews 11:1 that when seeking (spiritual) truth, that “faith… is the evidence”. “Now faith is the substance of things hoped for, the evidence of things not seen.” (Heb11:1)
Paul teaches us the folly of trying to understand our spiritual world by using the tools of the physical world when he writes in 1 Corinthians 2:14:
But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned. (1 Cor. 2:14)
I hope this helps you with your question of why physical evidence is not the main concern of Mormons. However, if you want to find the physical evidence for Mormon truth, CAF is probably not the best place to look.