Given that we insist that happiness is achieved only through Shi\'ism, isn\'t it unjust and unbecoming of divine justice to punish those who have no knowledge of any divine religions nor any understanding of Shi\'ism?

In the present time there are people in the world who are not familiar with any divine religions. That is because they do not have the means to get acquainted with such religions let alone Shia doctrines. Now if we assume that happiness is attained through Shi\'sim or admit that Shia is a better way of attaining happiness, doesn\'t this notion conflict with divine justice?