My $0.02, one doesn;t necessarily NEED to tell ALL, in order to heal; half of the stuff I could tell my T would bore her socks off , stuff she couldn't care less about.

It's my feeling that every client knows what's necessary to tell, in order to find healing, even if it's difficult or even **** hard to do it;
but when the client judges that something is not necessary to tell for healing, I don't really think it could be called "secrecy", that seems a bit hard.
Certainly not something as innocuous as posting on a (public, mind you) social forum of people with a common experience, even of therapy.