Which would you hire?
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I’d take the competent jerk. Chances are he or she may will always maintain competency and skill and, as a bonus, might even mellow out over time and become less of a jerk.
On the other hand neither affable empathy with good thoughts and prayers will ever deal with treating a medical emergency or life threatening illness.
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There's also a fairly decent chance that the 'empath' is a jerk deep down. In my experience they frequently are, so then you get the worst of both worlds.