New CEO an outsider?

GM board looks to the outside for replacement CEO

An ethical question that I have always wondered is how is it morally right to make someone a CEO that has no previous dealings with the company? I can understand if the circumstances of large executive fraud that they look elsewhere but otherwise it does seem sufficient. People poor their lives into the company rising from their entry position to upper management and when they believe that it is their turn they are mistaken. The outsiders do not know the organizational culture of the company, the people who work for it personally, or how day-to-day operations work. They have shown no previous dedication to the firm and are all of a sudden at the highest most powerful position in the entire company. Any comments on this topic?