Well, here’s the thing: Understanding degrees of culpability is useless if one does not first know right from wrong. Murder, fornication, adultery, contraception, theft, assault, bearing false witness, slander, detraction, and other actions are wrong. One needs to know that they are wrong before worrying about degrees of culpability.
When I got in trouble by doing some wrong as a kid, appeals to lack of full knowledge and consent didn’t hold much water with my parents. Nor, as an adolescent with traffic cops for that matter. Right and wrong: I was expected to know the difference and to do the right and avoid the wrong and not make excuses.
And wrong actions do have bad consequences regardless of culpability. I included contraception on the above list, for example. It has been considered a moral wrong for 2,000 years of Catholic teaching and 400 years of Protestant post-Reformation teaching, (being first excused by the Anglican church in 1930 for married couples, for serious circumstances. Sure.) But the bad social consequences could not be avoided. By unlinking marriage and sex, and delinking sex from children, it led in a direct line to the sexual revolution, leading to increased fornication, fatherless children, abortion, broken families and same sex ‘marriage.’ The consequences continue to play out, regardless of anyone’s lack of culpability.