Furthermore, our perception is fantastically limited, and this isn't hidden to us: we're certainly aware, or should be, that what we know of reality is negligible, in comparison to what's actually happening out there right now / what has happened in the past.
It reminds me of a story of a family acquaintance, who was in Algeria a few decades ago (I think this was during the Algerian War[0]): she was in a bus and realized she forgot to take something (guess this generally qualifies as a "bad" thing); while she was outside of the bus, it exploded, killing its passengers ("good" thing for her, but hardly feels like a "good" thing overall).
> this is literally unknowable
This, I disagree: for example, direct experience (really direct, not sign interpretation) could very well be one may to know for sure. The problem is, even if we agree that such cases exist, and are genuine (why not), it seems that sharing the certainty of such experiences with others is indeed impossible, unless perhaps to others hit by the same storm.