As a Product Safety Engineer I understand you're your point all too well - being a weapon system design company we have many safety requirements we need to address. Getting safety designed in is clearly my goal but there are many road blocks or hurdles that make that difficult and unfortunately too often we are only allowed to evaluate the design after the design is frozen and then getting the needed changes is difficult, that is unless there is a safety failure. If a failure occurs it seems the pendulum swings the other way and any resource required is provided. I expect you and I share similar frustrations.