Moral justice is more simplistic. It judges wrong as wrong regardless of the social consequences. It measures spiritual consequences equal between murder, hate, thievery, adultery and self abuse.
I contend that while a number of moral codes may well condemn murder, hate, thievery, adultery, and "self-abuse," a code that is incapable of discerning differences between these acts is not just, simply judgmental.
Additionally, unless you are saying "self abuse" means "any
use of intoxicants," there is a principle of "self-care" at work as a posited moral principle, and the measure of "abuse" is the trigger for a moral judgment "x is bad." Which makes it less black and white in the context of all the ways people have of "hurting their hearts" more than just "a little bit."
For example ever meet a dry drunk? Abstemious and self-abusing. A two-fer.