Network architectures are means, not ends.
The question is what are we trying to do?
Based on that context, we can determine whether a hammer, screwdriver, centralized architecture, decentralized architecture, or federated architecture is most beneficial for us. They all have tradeoffs (e.g. easier to remove screws than nails, easier to secure centralized than decentralized systems, easier to power federated systems than decentralized systems, easier to trust decentralized and federated systems than centralized systems) which can make them more or less useful for us in any given context. The point is, they are tools to help us realize our desired outcomes -- not the outcomes themselves.