its very simple actually, even though you are fucking other people's wives, they are still THEIR wives. meaning, its more of renting them instead of "owning" the girls or stealing them from those men.
it also doesnt help that sense of "used goods" that this particular aprouch has.
most people into netori dont want the girls back with their husbands, they want them for themselves, its the stealing them and making them value you above their current LPs that is important.
so in all honesty, i do get why its not as popular.
i particularly dont really care, so long its well done. but i will say, it feels off to be there just as a hired dick. its less taking them, and more sharing.