Harder to censor isn't exactly the goal. Harder to capture is. The point is to make social media providers replaceable so that users are able to express a choice. We do this already with the feed algorithms, which are predominantly third-party services within the community. As the rest of the protocol wraps, hosting and application services will be able to do the same.
The same way that any healthy market with competition is. The companies providing good services are sustainable, while those unable or unwilling to compete aren't.
