Why doesn't God remit everyone of original sin in Catholicism? I know that in Catholicism, Mary didn't have the original sin. If God had the power to do this, why didn't he do this with other people?
I know that in Catholicism, Mary didn't have the original sin. If God had the power to do this, why didn't he do this with other people?


The crux of this question lies in Man's purpose "to know and to love God, to do good according to [H]is will, and to go someday to heaven" (CCC 1-3, 358)

In Baptism, we "become members of the Body of Christ, sisters and brothers of our Redeemer, and children of God. We are freed from sin, snatched from death and destined from then on for a life in the joy of the redeemed" (CCC 1262-1274, 1279-1280)

However, to receive the benefits of Baptism, one typically must receive it Sacramentally, (cf. YouCat 199, Baptism of Blood and Baptism of Desire are beyond the scope of this discussion), and in a sense approach God, or open oneself to His presence. 
   Now, if Original Sin was forgiven unilaterally, what need would there be to approach God, and to come to know and love Him?