The 3,600 posts and comments I made on Steem these last 3 years give a lot of information about who I am. It can be analysed by an AI and sold.
With all due respect, anything you posted on the Steem blockchain was visible before this event too. If some AI wanted to process it, it could. Just because the blockchain was (more or less) decentralized, that didn't automatically meant it was also private. You chose what you let out.