Since we’ve essentially got two brains we have a nice social advantage. If an empath is unintelligent, they may still have the advantage of multi-generational emotional knowlage. That is dependant on wise careful parenting. This scenario is almost common knowledge. Even possibly a stereotype. One pop culture example might be Forest Gump. Guided by simple idioms and warm emotions, freakishly ‘lucky’, but not the brightest bulb in the box.
This is a nice advantage. If someone calls you ‘stupid’, true or not, you can take comfort in the fact that someone in your family or even your society may not have been so dull, and you carry their wisdom with you. But you already knew that didn’t you. 🙂
Psychopaths on the other hand are one trick ponies. If they don’t have the ponies upstairs, there isn’t much hope. They feverishly work with logic and their limited prototypes to demonstrate their cleverness. It only takes a little push to send them over the edge. Be a shame if they lost their temper in court don’t you think?