You've misread that passage, Rob.
Paul has just proven the Gentile - who had not the law - under sin. Followed by proving the Jew - who had the law - under sin.
He is now basically relating, the Gentile, who had not the law, has nevertheless been found guilty.
But so has the Jew, even though he had been able to boast he that was a Jew; that he had the Law; that he knew the way of God; that this, that, the other.
What Paul has been doing up to that point is cleaning up house in one indictement!
Law, or no Law, all are all together become unprofitable!
This towards serving up the righteousness of God in His Son ALONE!
The exclamation point is my spirit rejoicing in that!
Marvellous contrast - MATCHLESS GRACE!
Anyway, hope that helps
I understand and agree with that.