Actually, part of the ministry of the Holy Spirit IS to convict the world (not Christians) of sin. Or, at least, that is what the Bible says.
So as a holy temple of the Holy Spirit, not matter how you defile this temple, the
Holy Spirit is going to say nothing to you about your behaviour?
If you practice this over overt sin, you will not last in any christian community.
It is also saying God does not care about defilement of His people once they
are cleansed. Have you ever read that God is ok with a defiled temple.
Paul says this
Do you not know that you are God's temple and that God's Spirit dwells in you? If anyone destroys God's temple, God will destroy him. For God's temple is holy, and you are that temple.
1 cor 3:16-17
The reason the Holy Spirit is not concerned so much with the conviction of sin
in the church, because the church is meant to be walking with Christ as holy, pure
blameless people. But maybe the church is not actually as big as people would like
to believe and reality in peoples lives is still not well developed.