I've seen a lot of posts asking "why does the church not teach the King Follett sermon?" or "why hasn't the church implemented the King Follett sermon into church doctrine?" While the King Follett sermon isn't without controversy, I'd say that the bulk of it is taught in the church today, in some form or another.
Of course, maybe the question is really why it hasn't been made part of our canon. I think a big part of that is that we do not have a transcript of the sermon itself. The version most of us are familiar with (part 1, part 2) is an amalgamation from notes taken by four men who were present.
So in this post, I'm just speaking of doctrine-- and by that I mean "what does the church currently teach?" To do so, I will outline sections of the King Follett sermon, see how Joseph Smith taught it, and then compare with recent general conference quotes.
For simplicity, in general I will use the quotes and section breaks from the amalgamation to highlight the different topics Joseph Smith covers.