No, we're not all sinners. Born again believers are saints. We're saints who sometimes sin.
If we sin, we confess it and move on.
Most catholics seem to be hung up on the idea, that they think we can get saved, then we can go live like Hades, because, after all, we are saved, so we can do whatever we want. They have been told a thousand times this is false, and it hasn't sunk in yet. Someone who does that is not saved in the first place. That is the attitude I had when I was a catholic. I enjoyed sinning, because I thought I would go confess to a priest, say my our fathers and Hail Marys and I would be ok. Not. Now that I am saved, I can not possibly enjoy sinning like I did when I was a catholic. I don't feel good about it at all, but, as you say, confess it and move on. Not at all a difficult concept to grasp is it?
I’m wondering what happened to the poster who asked the question.
For all the answers that question has received, I have not seen one response to them yet.