Boeing blasted by US regulator for revealing panel blowout details to media
theguardian.com
theguardian.com
The NTSB process of determining actual fault is completely separate. The process itself is designed to not fault one person or company, but to simply figure out what happened so that it won't happen again. That's a completely separate process from what the company is doing, and it's not dependent upon or relying on the company in any way.
I don't see the issue.
> The NTSB said Boeing had painted the agency’s investigation “as a search to locate the individual responsible for the door plug work” during the briefing. This is not the case, it clarified: “The NTSB is instead focused on the probable cause of the accident, not placing blame on any individual or assessing liability.
Then I guess you're being willfully ignorant. I'm not sure what's unclear about this?
Boeing isn't allowed, per a signed and legally binding agreement, not to share any information from the investigation. They also aren't allowed to speculate on causes. They did both of these things. The things you state as arguments are irrelevant.