All of Boeing's self-certification rights should be scrapped. Clearly Boeing's internal safety culture isn't in a state where it can be trusted. Mistakes happen & planes fall out of the sky, but this seems like a rather pervasive culture issue.
What kind of teacher lets his kids self-grade?
I.e. I don’t see gold mining companies performing their own MSHA audits, but I do see them building controls and processes to satisfy safety regulations
This wasn't for final exams obviously, more like quizzes and such.
You can build a lightweight craft (see FAR 103), self certify as such and fly without ever talking to the FAA. Your lightweight craft could be 100lbs over the limit and no one would know until it crashed and the NTSB got involved. Your lightweight craft could also be a Cessna. You are guaranteed to get into more trouble when the FAA finds out you are grossly violating the law.. especially if loss of life is involved, see Boeing as an example.