I think this has as much to do with personality type as anything else. I'm INFJ and my IQ is higher than yours. I rarely grow impatient with discussing difficult topics with others, indeed, I enjoy helping others grasp hard concepts (such as the law) so they feel more empowered and in control of what is going on in their situation.
I do not have patience for narrow-mindedness, however. I bow out of such discussions because I do not believe it is productive... people don't often change their opinions based on a discussion. (They usually don't understand enough of the topic to be moved by new or different information.)
On the validity/purpose of IQ scores:
I do not believe that high-IQ is necessarily an indication of potential success, either. IQ is a gift or talent, just as artistic ability, musical talent, or ability to understand others is.
I don't like studying for fun. School has always been a struggle for me, in part because I was anxious and avoidant. The law itself is almost lost on me; it takes great effort for me to understand legal concepts. I consider myself a law idiot. Others grasp these things as naturally as they breathe. It makes sense to them, they deduce and conceptualize the principles as easily as I negotiate and work with people.
Thus, IQ and behavior is, to me, inextricably linked to personality. I'm a typical INFJ with a high-IQ. My husband is a typical INTP (impatient!) with a high-IQ. (He doesn't understand why law is so difficult to me; I don't understand why it's so hard for him to use euphemisms and be nice!)