Why didn't she stop at the red light? Simple. She didn't have to because there was no one there with the authority to enforce the law. She will continue to run red lights until she is compelled to obey the law. The number of cars on the road and the reluctance of the police to issue tickets means she has a very good chance of running red lights for many more years.
Throughout history the Church has also struggled with this problem. People haven't been obeying the Lord because they haven't had anyone enforcing God's will. The Church has tried to take His place on the earth and administer justice. The effort may have had good intentions but it has always caused corruption. Unchecked power corrupts.
I can understand why those do not know the Lord won't obey Him. Why should they obey someone to whom they have not committed? Any obedience is for appearances which is not obedience at all.
I understand why God would compel those who are not committed to Him. There are things God wills which will not happen without the cooperation of those who are not committed to Him.