Attending Mass in Mortal Sin
Why attend Mass if one is in state of mortal sin?
Missing Mass is itself a sin, so why add another sin on top of the sin(s) already committed? If I am already sick, why would I purposely injure myself further?
Mass involves hearing the word of God, which can help move our hearts to repentance and true conversion which is something someone in mortal sin would need.
The essence of sin is a turning against God or our neighbor. By skipping Mass, we avoid both God and neighbor and solidify ourselves in our sinful state, whereas attending Mass can help begin to heal those relationships.
Attending Mass in a state of sin and being unable to receive Communion is a powerful reminder of the consequences of sin and can move us to repent and avoid sin in the future.