AFAICT: The advantage of #bluesky #ATproto is that they support easy search and the ability to view all the network statistics in one place. They do this by bringing together all the decentralized data in one place, relying on there being basically one relay that everybody uses.
But this means that as/if the network truly becomes decentralized (and power over reach is no longer concentrated), you lose all of its advantages. So while it allows for decentralization, it encourages the opposite.