We have passages that pretty plainly imo express that God did in fact not know the outcome, and recognized that His plans needed to be tweaked. Of course this does not comport with our perspectives on omniscience and perfection(ism), etc, and also imo speaks to our pov @ "free will," which many will go to great lengths to assure you that you don't have. Imo go find what the Bible says in the mater and form your own opinion, there are plenty of vv on the subject.
Of course I agree that God did not create us to perish as you say, but then we might be defining that term diff right now. Fwiw I would beware of self-professed Oracles in here ok, I say "self-professed" but of course they would not admit to this, but rather exhibit this, if you get me.
Anyway, it is easy to maybe...to get fixated on the "dross" part of the refining process, so to speak, and imo this is another function of denying Free Will; bc behold, you are called to make a choice, in real time, even as we speak? And while surely a chrismatic enough person might sway you with some declaration of Absolute Truth, and insisting that you must abide by it, but again that is a choice that is up to you.