I mean you can still be creative and an active participant on a centralized platform. Sure there are edge cases that the platform itself might boot you off for, but those don't affect most people in general. Also decentralized entities can act and collude in similar ways in the name of blockchain governance (moreso EOS rather then Steem) even though the underlying data is preserved.

Also the reason Facebook works so well as a social network and a marketing giant is due to localization. Rather than primarily being a content provider, it serves as a connection provider which allows users to receive content via those connections. Much more organic networking than we see from global blockchains with no focal points.