I’ll admit that there are some odd things that have been written down in the Journal of Discourses as apparent quotations of Church leaders. The vast majority of the sermons written down in there from the 1800s make a lot of sense to me, but I’m occasionally puzzled about what was meant for some quotations, if they are accurate. But we need to remember that Journal of Discourses is a useful tool, but does not define official LDS doctrine. Even though the vast majority of it is clearly aligned with LDS doctrine, it is not a definitive, authorized source for us. **I can disregard the whole multi-volume set because we are not accountable for what’s in there, no more than we are for the personal speculations of any other Church leader. **
If we had third-party renditions of every sermon that Peter or Paul ever preached, and documents allegedly giving many other statements that they made, you can be sure that there would be occasional puzzling moments (we already have some of that in the scriptures as it is). But pretty much all we have from them now is the tiny fraction of their words that became accepted as scripture. It’s not that way with Brigham Young and other Church leaders, for whom we have volumes and volumes of non-canonized statements and musings. Actually, we do have many volumes of writings from various Christian leaders over the centuries, and they have touched upon many puzzling topics and managed to contradict each other over many issues, sometimes in bitter arguments about things that just don’t make sense today. And often we have their own personal writings rather than third-party recollections or transcriptions of what was said. Mainstream Christians usually don’t even know about such writings and just ignore it since it’s not in the Bible. After all, why should Catholics worry about some outrageous quote from Augustine, or why should Protestants worry about some extreme statements from Martin Luther, if such is not part of their canon of official belief? We should be given the same courtesy: if it’s not official doctrine, the speculations and alleged quotations from Church leaders that we don’t accept as doctrine should not be held against us unless our critics are willing to play by the same rules.