But at the same time, when it comes to business decisions, personal relationships often take a back seat (i.e. Zuckerberg), and sometimes it's simply good business (i.e. Eric Schmidt leaving Apple board probably due to Android vs. iPhone, WePay icing Paypal, companies suing each other over IP/copyright... etc).
I'm not at all criticizing the people startup community, but just noticing the similarities among us that drive us towards a similar goal of success with that of Everest climbers trying to summit. To outsiders of either community, certain decisions may seem unintuitive, or even outright morally wrong, but sometimes perspective is everything.