[gitgud]

Precisely, centralization provides a simple architecture for the system.

However, since all the power is concentrated to one "source of truth", it can lead to unfair decisions for the rest of the network.

Decentralized systems are ideal went you want to ensure there's fair decisions for the whole network. It's much more complicated to build, but worth it in some cases eg; crypto currencies, governments etc.

Also it's not strictly a black and white categorization, systems can have levels of decentralization; eg: the internet