I'm not disagreeing with you. I simply believe that the kind of person who could best choose and maintain a commitment to love (not in the "in love" sense) would be the kind of high-functioning individual I describe. If somebody is loving you in the verb sense their love will necessarily be associated with loving behavior which generally would be associated with functional behavior. I personally have no desire to be married to the guy who quits his job,goes on a weekend bender, comes home and kicks the dog while yelling "Where's my dinner!" but then says "Love ya, Babe!". oTOH, I would probably feel very loved, maybe even in love, in a relationship with someone who was mostly like a very high functioning roommate but with whom I had great sex and exchanged affectionate gestures. Maybe you were just thinking that there wouldn't be any affectionate gestures in my scenario? I think the ability to exchange affectionate gestures is a sign of high functioning too.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver