Excellent to read your Blog and thank you for capturing this analogy, it made a profound change to my life when I learnt this from Roger Hamiliton in 2003, to me this is the essence of networking; finding others that compliment your weaknesses and helping them with theirs.
BNI is an excellent sales referral network, but at its heart is the ability for the members, who really ‘get it’, to help one another though collaboration and masterminding one another. Friendships spark up that last a life time and then change really happens in life.