There are, around the world, many millilions of people who believe in one religion or another. A study of theology gives an insight into the mindset of groups who influence (or seek to influence) societies, politics and morality. To study theology does not presume belief in any kind of deity.
Given that Musket has been the CEO of several companies; run the NHS; is one of the foremost guitarists of this or any other generation; is a trained investigator and one of a minority of ex miners to have a PhD as well as an ex health regulator (this is not a comprehensive list of his achievements) I would have thought that he might have realised that.