I wish you understood how utterly sad that reply to Mark was. It shows a total lack of understanding of what a regenerated heart is or it’s desires. There is not a born again Christian ever that would entertain those thoughts.
You are so correct. To a born again Christian, when we give ourselves to God and our as heart changes we start to change in all ways! Suddenly we don't have the desire to do the things we did, don't have the desire to go to the places we frequented, don't have the desire to hang around with the same people, ect. The desire we DO HAVE is to get closer to God.
When we are Redeemed, we have the desire to please God and everything in our life changes. We don't use the excuse of Confession to allow ourselves to do anything we want to all week because the Priest can make it all go away every Saturday.