A most distressing story. Note that the man involved was not required to forfeit his life.
Probably what it really is is the Mullahs can get away with killing or abusing women and girls more easily than they can get away with doing it too frequently to young men, who might organize an uprising and fight back. So the Mullahs push as far as they are able, a few men, many more women. I suppose the Mullahs must create as much fear as possible to maintain control, but cannot apply too much directly to young men- so they compensate by going after the most defenseless individuals, so as to control not just the weak, but also the fathers and brothers who love their families and want no harm to come to the women and children in their care. A form of blackmail- "rise up and we'll go after the women and kids."
An execution like this serves as a reminder of what can happen to a family.