Steemit and Facebook don't really compete.
This is more of a blogging platform than Facebook and tbh that was never really that great when used for that.

Steemit is more of a competitor and alternative to Medium if anything.

Leaving one platform for another won't solve the problem.
What we need is to edubcate users as to what data they are sharing and to hold those responsible accountable for handling that data responsibly.

There are still questions to be asked about the use of blockchain here.
With all of the right to be forgotten and new GDPR rules coming in it stands at odds with having a permanent record online.