I don't know if either of those are actually true, there are plenty of good CEOs who came from zero experience in the industry. And plenty of bad CEOs who came from plenty of experience in the industry. Both of these run successful and not successful companies.
For example the currently Boeing CEO does not have experience in airplanes, came from a business background. And is considered a bad CEO by the average person (though considered a good CEO by stockholders, or at least was before the past few months).