You are a pretty fair and balanced guy, imo. The bolder surprises me. Almost every friend I have now is LDS and my business partners (every one of them) are bishops and stake presidents. Each one of them, to the person, can quote BoM chapter and verse (end hyperbole) but readily admit they only passively crack open the Bible. That is every Mormon I know. That's not being judgmental by the way, just an observation.
all I can say to this is that I can and do quote the Book of Mormon, too. Maybe more than I do the Bible, even. There have been some leaders who praise the Book of Mormon as a better way to get closer to the Lord. So, people looking at a complex world or picture will focus on one aspect or another, and maybe get completely different impressions. My comment is not scientific in that I have not compiled thousands of current quotes and classified them as sourced in the Bible or Book of Mormon. I don't care enough to do all that work. I do "look for the source" when I listen to talks, that's about it.
I have this "working theory" of Mormonism that is shifting a bit with more recent inputs. I notice "dropped themes", or things that are falling into disuse currently, and "new themes" or things getting more play. Good Mormons will get hot or bothered, perhaps, when I irreverently or disrespectfully characterize what I think I see, because it's certain that's not the part of the picture they want to see.
I imagine I have more respect for God than changing fashions of thought.
The Book of Mormon's content from the outset consisted of religious or speculative themes that existed in the area of the northern American woods frontier. The idea that the aborigines were lost Israelites had been advanced for over a hundred years. Most of the prominent doctrinal themes involved extensions of Isaiah's prophecies about the ultimate restoration of Israel, New Testament ideas, and what I'd term post-Pauline expositions. There were massive remains of earlier civilizations that had no fixed history at the time, lots of weaponry lost in the woods, deep layers of bones in some spots suggesting genocidal wars. There were findings of copper and silver artifacts that fueled a speculative employment of young boys to dig for treasures like that.
I do know a lot of nice LDS folks who read the Book of Mormon and feel it is the centerpiece of their faith. Maybe it does not get the play in the press/conference context, or in the lesson manuals, because of a purposed intent to focus on stuff that might be more familiar to the new converts or something, I don't know.