Personally I don’t see the need to release the report to the public but it is good to study. That’s how improvements are made.
I can tell you from a lot of experience that if such reports are not made public they get swept under the rug and the status quo is preserved. In fact the first indication of a management that wants to cover their tails rather than fix problems is a management that tries to suppress negative information. Good management requires good communication. Good communication rarely works well in secrecy in a large organization.