This has to be the biggest strawman argument for catholics to justify the control the priests exert over the membership.
We all sin. We know this as Paul admitted he struggled with some sort of sin. He didn't specify what it was. Was he conducting his life in anyway he chose??
If you are a believer in Christ you will produce good fruit for Him. That is a natural outgrowth of being a follower of Christ. At least it's supposed to be.
Catholics need their strawmen. They cannot defend Catholicism with scripture.