>There seems to be confusion about what constitutes 'strength' and what constitutes 'weakness' in regard to human personalities (or 'hard' vs 'soft')

This here is the crux of the matter, and we only stand to lose if we go on with all the hyperbole and analogies around psychopathy. The value and consistency of what constitutes "weak" and "strong" depends to a large extent on the feedback we (and "they") get in everyday interaction (whether they live in a city or grow up around Baloo the bear). Burying psychopathy down to some exclusive and immutable genetic level is to ignore this (I'm not talking about causes here, but about behavior reinforcement and motivation).