If we want a truly robust system, yeah, we kinda do. This sort of event is only one of the issues with allowing a single entity to control pretty much everything.
There are plenty of potential issues from a corrupt rogue corporation hijacking everything to attacks to internal fuck-ups like we just experienced. Sure, they can design a better cloud, but at the end of the day, it's still their cloud. The Internet needs to be less centralized, not more (and I don't just mean that purely in terms of infrastructure, though that is included of course).