Yes and no. Blossom uses a SHA256 content hash, so content has a unique ID across the network.

Users can publish which servers they use, so you know where to look for a users content alternatively.

It does not magically solve the storage of the content "somewhere on the internet" though. A user must actively publish his content to multiple servers to get censorship resistance and might need to pay for it.

That being said there are links between servers, so if a piece of content is missing it could be automatically fetched from an upstream server.