Avira > my rosh yeshiva says bshem the gaon that Y/Z having the same schar only applies if the Z tried his best to bea Y, but hashgocha led him to have to work. Otherwise it’s not logical
Right, whatever was logical for centuries, now is not based on your personal mesorah. Were you in charge of Gan Eden, would you know expel those Zevuluns that got there before this psak?