The thing is that is a significant difference between how we perceive events in real time, in real life vs what they look like after when laid out in text.
In real time people simplify, they disregard contrary information (they have to, otherwise things would never “make sense”), and they pick a strategy that seems most plausible at the time and so forth.
By contrast reading a text after is like reading a multiple choice exam, where we know the answer. The wrong answer, the one picked at the time is obviously incorrect.
This is why in discussing incidents here there is always so much bafflement that such a thing could happen.