[haltingproblem]

The theory is just that - a theory and a convenient one at that since it exonerates Boeing engineers.

The is no evidence supporting the theory (verification) and more interesting it is not falsifiable. It is just a narrative.

[1123581321]

It is falsifiable, given access to the record of management decisions and hiring data and some agreement on what a consequential company decision would look like.

Whether some people think it “exonerates” current engineers doesn’t matter. I don’t think it does, personally.

[tangjurine]

The evidence for the theory is that there are many Boeing 'apologists' as OP states - he is trying to debate them, not people that don't care if Boeing ever had a good engineering culture.