If there's one lesson that LDS apologists will stress over & over again, it's that...
...LDS standard works (their "scriptures") easily trump (no comparison) non-standard works.
...That LDS-canonized "Scriptures" trump non-canonized materials.
...That LDS prophetic revelation trumps LDS opinions & "speculations"--even when from LDS "prophets."
What we have here, and Broncobilly knows it's so (yes he decided to obfuscate) is a mere "opinion"--a mere "speculation" on the part of Smith...Every Mormon knows that the Documented History of the Church--at least most of it--is not an "inspired" document even to them. Yet what does Broncobilly do? He goes & cites D.H.C. vol. 5, p. 517. 1844 in an attempt to trump LDS official canonized prophetic revelation that is part of the LDS standard works:
Pearl of Great Price - Joseph Smith - History verse 20: I then said to my mother, “I have learned for myself that Presbyterianism is not true.”
And the context of where "Prebyterian" faltered in the eyes of Smith? ("All" their "creeds"). I mean what difference does it make if Smith threw them an 1844 bone that Presbyterians can distinguish the truth of the left shoe from the right shoe if ALL their creedal beliefs were so abominable to the mormon god?
But the big lesson is that LDS apologists cannot continue to have it both ways. They can't pretend to get on their high horse & lecture "lowly" folks who cite LDS prophets of history on the fine points of standard works, canonized sources of info, and prophetic revelation if they turn around and openly commit this same so-called "error."
They need to be consistent.
...not always giving a fullness of truth such as may be found in the fullness of the gospel of Jesus Christ...
If the "fulness of the gospel" as you describe was so important it would have been in the Book of Mormon, which Joseph Smith described as the "fullness of the everlasting gospel" (see D&C).
We don't see a "second-chance" gospel in the "full" Book of Mormon? (baptism for the dead or for "three-hundred-fifty millions of people that live in China") now do we?
We don't see the gospel of becoming a god or eternal progression in the "full" Book of Mormon, now do we?
We don't see families and marriages are forever as a "gospel principle" in the "full" Book of Mormon, now do we?
We don't see a flesh & bone god in the Book of Mormon, now do we?
We don't see temples as LDS build them today nor temple rites as LDS implement today in the "full" Book of Mormon, now do we?
We don't see gospel principles describing the eternal glories of three degrees of heaven in the "full" Book of Mormon, now do we?
We don't see temporary spirit prisons and temporary damnation in the "full" Book of Mormon, now do we?
We don't see the "gospel principle" for women that if they want to reach the celestial (highest) kingdom, they need to get married in the "full" Book of Mormon, now do we?
We don't see the "gospel principle" of immortality being obtained by way of mortality in the "full Book of Mormon, now do we? (What I mean here is that LDS believe that immortality occurred because Adam & Eve sinned & became "mortal"...up until then they were just bloodless creatures...by sinning in such a way, that opened the door to godhood...therefore LDS leaders call such sin, disobedience, & the wave of consequences upon the earth ever sin as a "celebration"...elsewise men could not become immortal gods). not found in the allegedly gospel-full Book of Mormon, but this should suffice.