Sam, I think I hear what you’re saying, but I think we run into a roadblock, which I’ll repeat (but subdivide for clarity):
I think it is:
A) logically impossible to unequivocally believe something when you know your opinion may change (stirah minei ubei)
B) “theologically” (for lack of a better word) untenable to accept that the ratzon Hashem is for us to unequivocally believe something which is not true.
I just don’t see how to get past these, once we pasken that there is a chiyuv to believe.