No, O9A insight roles don't require "a system of societal morality." They only require that a person choose to live, for a year to eighteen months, a way of life or take on an occupation that requires them to act in a manner that's contrary to their own character. The choice of insight role, and the honesty of deciding what their own character is, is entirely up to them. It's their judgement, their self-honesty, that matter. There is no dogma.
The O9A has suggested some general types of insight roles, as examples, that's all. Like being a cop if you're rebellious by nature and dislike authority. Or being a monk if you're a hedonist or a former con. Or opening and running a brothel if you're disorganized and lack people skills. Or becoming a neo-nazi activist if you're a liberal at heart. Or becoming a drug-dealer if you're a law-abiding or shy. Or becoming a nurse in a hospital if you think you're a 'hard man'.
So it's the character of the person that determines the insight role, nothing else.
Given that all this kind of stuff about the O9A is 'out there', in cyberspace, and has been for over a decade, it's amazing that people keep making false claims about the O9A. Or maybe people just can't be bothered to read O9A material. Or if they do read it, they don't 'get it'.
Which is exactly the raison d'etre of the O9A seven fold way, which is a decades long personal quest. Spitting in the face of society may be something an O9A novice (or External Adept) may do once or twice just for fun or to personally learn something from the experience.
The key to understanding the O9A is pathei-mathos: a personal learning, and a self-development, from practical esoteric and exoteric experience, some of which experiences should be difficult and dangerous, and some of which can be 'heretical'. That's all there really is to the O9A.
Again, this is all 'out there'.
) is what would the overall purpose of human sacrifice (or any other life sacrifice) be?