I bet this is at least a contributor to the lack of people going to confession. As you said the diminishing of the idea of sin and the distinction between the two forms.
âBut immorality and all impurity or covetousness must not even be named among you, as is fitting among saints. Let there be no filthiness, nor levity, which are not fitting; but instead let there be thanksgiving. Be sure of this, that no immoral or impure man, or one who is covetous (than is, an idolater), has any inheritance in the kingdom of Christ and of God. Let no one deceive you with empty words, for it is because of these things that the wrath of God comes upon the sons of disobedience. Therefore do not associate with themâŚâ
According to St. Paul, no matter how âborn again,â âsaved,â or whatever you think you are, if you commit these sins and you do not repent, you will not go to heaven. That is the essence of what âmortal sinâ means.
Id say thatâs a good enough reason to make the distinction donât you?