According to your doctrines--the BOM is scripture also. Whatever is in it, is therefore doctrinal. And I do not believe that Moroni, if he was indeed real at all, (which I doubt highly), was sent by God. I do not believe anything in the BOM to be real. I tried--not happening, and I'm not reading the rest-- If JS did see this Moroni, the mistake he made was in believing him as he didn't not do as the bible instructed--and these have been quoted frequently--
(Gal 1:8) But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
(1Jn 4:1) Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
JS was either deceived, or he has done the deceiving--which I am more inclined to believe. But, that's just my opinion and
nobody really cares what I think except me!--Ya'all have fun now!