Let’s be honest. There is no such thing as sin. Sin is a man made abstract concept to control and manipulate people. In the absence of any form of morality or values, religious charlatans created the concept of sin to protect themselves of any responsibility. Sin is only there to create a feeling of guilt inside you. And they have control how to forgive you. You cannot forgive yourself. But here is the catch, you have to ask some invisible deity for forgiveness. And you are never sure if you are forgiven are you.
The more you pay these cults, the better the chance is that you are forgiven. So it is basically extortion.
Sin is an imaginary problem and concept. Religious organisations base their business on the fact that they are the best to relieve you from that guilt. It is an imaginary concept invented to sell you imaginary cures.