I’m aware of the Peter Thiels of the world and (prior to that, Bill Gates) and so on, but it’s also where FOSS lives and Open Source itself is a collectivist process, albeit a very slow one in most cases.

The lack of co-ops is (IMO) more likely due to timely processes related to decision making. New code can be deployed instantaneously, but direction and all the bells & whistles all take time and it’s just about impossible in a traditional heirarchical organization. I’d expect if there was no single entity making decisions it’d take even longer to do basic things.