Where in the world did you get that idea? People who accept Jesus have little desire to sin. Sure, we mess up but we know how to ask for forgiveness. No one is perfect. We are sinners saved by grace.
Catholics get that idea because they have no idea what the indwelling presence of the Holy Spirit does to one both in giving them a regenerate heart and a revulsion to sin.
They don't understand it because they've never experienced it, therefore they continue to think with carnal minds.