How high an IQ are you talking here? I have a moderately high IQ (~130) and being able to explain complex topics to family and friends in a simple enough way that they understand it is one of the things I enjoy most, probably because having a basic summary then the meaty material is how I best learn complex topics.

I don't think humility, empathy, and high IQ are mutually exclusive, though given some of my experiences with smart people I can see why you might think that way.