In the same vein, I would say people who form the chain of the formal, pre-defined, conditional relationship are like people interested in watching Television News Channels. They only want to get the news first, but really not interested in doing anything with it.
For example suppose you are alone in the city and meet with an accident. You make calls to people you know to inform about your ordeal. A true friend will not ask a second question after he gets the news and will immediately reach out to you at the earliest. Whereas if it is not the case, there will be a hundred questions poured on you including when and at what time it happened, why did you not inform earlier and finally end up with a statement like “take care and keep me abreast with your progress”.
Friendship is like the “SUN”. It is always there at the same position giving the same warmth to us. If at all we see day, night and global warming in our friendship, it is only because we are not static and keep depleting the good atmosphere around us. It is no use blaming the sun for that.