Just like Boeing did with the 737 Max, backed it all up with engineering degrees, calculations and modelling, we all see how that went. Lion Air were still flying when they knew from the engineers to the top level managers that something was seriously wrong, they still let the aircraft fly with disastrous consequences. That's what happens when you let corrupt management do what they like with no regard to human life.
The CEO of Boeing was asked several times if he was going to forgo his pay bonus because of the problems with the Max, he wouldn't answer the question, dollars are more important than anything. Keep em flying what's the worst that could happen?