I don't think it is confusing and I don't think it is what you're suggesting. The wiki explicitly says that the act of prostitution is legal but the act of procuring it is illegal. Essentially you get arrested for paying for sex. The John. This is often done so that women have more of a safety net and can feel more comfortable going to police if they are abused. In other areas if you are trafficked you might feel scared to go to the police out of fear that they will arrest you.

This isn't the same as saying that prostitution is legal because the transaction is still illegal. It also doesn't resolve the issue of the correlation, which is the main point.