My experience is with the LDS I personally (family and friends) know as I have said previously.
You are free to believe the statement or not.
I find it interesting that you say every ward in every state is studying the exact same thing at the exact same time.
Does that not go to the direct point that there is no direction from the Holy Spirit for revelation or leading from God?
Do you understand much about the Spirit and/or revelation? or are you just yanking my chain? What does the fact that the same lesson is taught throughout the land have to do with the Spirit or revelation being involved?
All I can say about your LDS “friends” is they must not go to church much if they haven’t learned about the bible.
BTW, what is the stick of Joseph?