"A good friend" is in the eye of the beholder. One might believe a good friend is someone who always agrees with them and goes along with whatever they want to do. While another person values someone who tells it like it is or just listens without judging or trying to fix them. But I don't believe it should be considered a duty or obligation. It is something you have to sincerely want to be. And of course, we can't always be the perfect friend. Sometimes we are even nasty to our friends and hurt them. But if we are good friends, we both trust each other to make amends. That takes skill that can get one through life much more happily than any book knowledge or mensa score. That's not to devalue intellect. But emotional intelligence is just as valuable, i.e. self awareness and regulation, empathy and other social skills used to influence or motivate others. A scientist may discover or engineer invent the greatest thing known to man, but without the creative skills of R&D and marketing people, it may never come to fruition.