BMC receives no funds directly from the Church, only via the Church of Jesus Christ of Latter-day Saints Foundation, and is not controlled in any way by the Church.
What is The Church of Jesus Christ of Latter-day Saints Foundation and where does it get its money from?
Premise 1. Eyewitness testimony is notoriously unreliable.
Premise 2. The best evidence for the Book of Mormon is eyewitness testimony.
Conclusion. Therefore, the best evidence for the Book of Mormon is notoriously unreliable.