Determining how deep that goes is tough. Replacing the executive level is admitting the company must replace with a radically different culture. Those take time to cultivate, and the US incentives are aligned such that without great effort, standard American business culture is to evolve to what we see from Boeing. The tragedy isn't that Boeing is exceptional in its systemic broken culture, the tragedy is that this is par for the entire American business edifice without assiduous work by company leadership (many examples of that working away without recognition, but business journalism shares blame in lionizing on KPIs that don't measure for the brokenness); Boeing is simply different by scale of acute fatalities flowing straight from the business culture.