Respectfully, while I would agree that the law is for sinners, I do not believe that the laws will help in compliance, which is why I said the inside of the cup must be cleaned in the first place. In fact I am pretty sure that sexual assault was already against the law in Nepal before outlawing inappropriate contentography. And scripture even says that the law is the strength of sin.
In regards to the context of 1 Timothy 1:9-11, Paul begins by saying that some wish to be teachers of the law, but he implies that it is only a vainglory through ignorance working in them, 1 Timothy 1:6-7.
The reason the written law is for sinners, is because the letter of the law can only condemn mankind as "weak in the flesh" sinners. So the law should not be understood to be a means to instill righteousness in mankind but to point out our own weakness in the flesh.
Moreover, the Spirit of the law, which is Love/empathy, will never be manifested through the fear of the punishment for transgression contained in the law. If we believe and talk as if righteousness comes through the law rather than acknowledge a righteousness imputed by grace through faith, then is not God's grace frustrated? For this is why we preach the Gospel of Christ who died for our sins.
Galatians 2:21
I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.