Yeah, it is usually not about blaming the engineers in my experience. It is about so they can make a descion they want to make without having to think too hard or take any accountability. If nobody knew at the time it was bad everyone can just act surprised and call it an accident and just go on with their lives making similar uninformed descisions.

In their dream world the engineers would not know about it either.

Edit: Maybe we should call this style vibe management. :D