... and behaving like one would expect from a man like that if one didn't know him intimately. And Chapel knowing him intimately might make her eminently unqualified to utter insults like that.
That's having it both ways. If it takes someone who knows him intimately to tell the difference, and
if knowing him intimately disqualifies an observer, then we might as well just replace everybody with androids that are "close enough" to the original. Any difference doesn't matter.
We have to defer to the person who knows him intimately, even if we wonder about their judgment.