I believe that the reason for the lack of transparency in Scientology operational policy and technical bulletins has nothing to do with danger of restimulation of cases. Instead, I'm convinced that confidentiality is used on the Admin side to protect the organization from it's parishioners (and it's staff, largely, through compartmentalization) from discovering the way they are being manipulated into giving their time and money to a group that will ultimately destroy them or entirely co-opt them, unless they have the good sense to leave. I believe the reason that tech issues are marked confidential is similar, but also includes the desire to have the person "properly set up" for the actions.
"Setup" might sound benign; it is anything but benign. "Setups" in scientology take the form of eliminating counter-intention through confessional, sec check, False Data Stripping, False Purpose Rundown, etc. A person who isn't "setup" in this manner would probably look at the absurdity of the materials in CC-OTIII, and realize immediately that he'd been taken.
Hubbard must be seen as a prophet offering you the road to his level of enlightenment, and any thoughts you have that this is not the case YOU MUST HAVE LEARNED TO SUPPRESS.
That's the reason for confidentiality. To build confidence in Hubbard and his organization, such that it over-rides your own good sense.
What's a confidence game without "confidentiality"?
GAME OVER SCIENTOLOGY. The interwebs are removing your "confidentiality", obliterating your compartmentalization, and restoring individuals ability to think for themselves with the real data at their fingertips.
Transparency and accountability are the only way out.