As opposed to...? I'm not aware of any major religion that openly admit their teaching is made up BS. All seem to claim to know "the truth".
Do you have a citation for this? I am reasonably familiar with Mormonism (The Church of Jesus Christ of Latter-day Saints) and I don't think I have ever heard this before?
The Mormon church, of course, has its wings of scholars trying to find evidence to support their origin stories (like looking for their god's original home planet or buying ancient South American temples to hopefully find something supporting the story of white peoples in the early Americas) but they also fully lean in to the idea that humans are inherently fallable and human reason isn't as powerful as faith and feeling. I think this is well demonstrated by the ritual of "bearing one's testimony" in church which is always ways you FELT the holy spirit or by the modern forgiveness (and embracing of) the clear corruption and deception of the original prophet Joseph Smith (like the demonstrably false book of Abraham, for example).
This isn't even supposed to be judgement of one way over the other - I'm just describing the very strong difference between Christian apologists like the author (who want the true truth the right way) and other kinds of proselytizing (that are more supportive of "any road to the right answer").
As opposed to Buddhism, Taoism, Shinto, Jainism, etc.
There are ways of interpreting and practicing Buddhism in which this is less important (eg modernist, psychological, western), but that's also true of Christianity (eg the Jefferson Bible, Unitarians, etc).