In the case in question here, there is no obvious engineering design flaw in the door plug to hold anyone accountable for. To the point you were replying to, it's also not clear there was an obvious management decision that led to the plug being reinstalled improperly.
I don’t know enough about the door plug, but TFA also implicates the MCAS scenario. In that case, not only were there design flaws, but had the engineers followed their own internal design processes, the flaws could have been mitigated better.
