With nearly 4 decades of hands on experience in the industry, the one consistent problem I have observed, done myself, or watched company after company do, is that they make the same mistakes over and over again.  Their need to be right causes their own pain and suffering repeating work over and over again.  This is the building inspector that lives within us all driving the mindset that continues to defeat us continuously in many different forms.  The need to be right, regardless of how many times it takes until it gets done correctly versus learning to do it by the design.