In these democractic times it is unfashionable to recognize that they might - that there is a satisfaction and pleasure in being obedient. However the Anglican Church is close to the Roman Catholic Church in ritual and theology except, of course, in their opinion about the authority of the Pope. Even though the essay gets Lewis's denomination wrong it is not far wrong. Today's fashion is for ideological explanations. The principle remains that personal responsibility is unpopular - for ourselves of course.
People can be quite enthusiastic about other people being personally responsible.
But there is a real difference between Milton's Satan and Lewis's. Lewis strips Satan of glamour. His focus is on the small and the petty, the ordinary and little. When it comes to evil on a large scale he turns to figures which are not precisely human, e.g. the witches and giants in the Narnia series. He doesn't treat evil on the large, human scale.