That the content is there in the public is fine, we all know and agree its written on the blockchain.
But that every movement on the Steemit and the other front ends is shared with so many third parties i think few understand, or even care.
Here is a good read:
https://steemit.com/privacy.html
How much is your privacy worth?
RE: Why STEEM NEEDS To Promote Decentralization: Facebook Breached!!!