That is true. But... If one of the primary functions of a service/site/app is to organise relationships via a network of people... then that isn't suitable fo

That is true. But... If one of the primary functions of a service/site/app is to organise relationships via a network of people... then that isn't suitable for this purpose. The core function needs to be organising around an interest (composed of 1 or more of: topic, place, time), and that core function is so strong that it shouldn't offer the secondary function of then networking around people. People are very good at backing into small groups, forming cliques and communicating privately. Of constructing the very bubbles that are the issue here. A system that puts interests first has to avoid this by not encouraging it. It will still happen, but it shouldn't be a primary function.