Not being an industry expert shouldn't necessarily be a disqualifier. For example we don't insist that the secretary of health should be a doctor, or that the defence ministry should be run by generals. The main qualities needed is being a good manager and able to listen to alternative views and being a good politician (yes, it's important to have good politicians). If anything being an outsider actually helps the organisation more because it avoids conflicts of interest like op and it keeps the head humble.