You're assuming all that is true. Do we have more than Boeing's possible CYA claims to go on? (An honest question.) Also, have we heard their side of the story?
We will know once the FAA and NTSB did their investigation and audits, and published their reports.
Just to repeat: When you work in aerospace, you do not work on an aircraft without documenting your work and any deviations or non-conformities. Period. And even if you are forced and pressured by higher ups to do so, you do it properly. The fact that we have a whistleblower tells me rank and file are less than happy with the status quo so. Doesn't change the fact that someone made a serious mistake working on an aircraft. That alone is serious, even if it wouldn't have resulted in an incident.
> Boeing admitted there is no documentation to come by
Doesn't that serve Boeing's interests, to bury any record of possible harmful events, and to also bury the record of that information passing through other hands at Boeing?
In other words, should 'Boeing admitted' be taken at face value, as an admission of guilt, rather than a possible coverup of much worse and a way to throw the line workers under the wheels?