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.

That is true in orange 'Neo-abolitionism', not in blue 'Abolitionism', where buying sex is also legal, just not 3rd-party involvement.

You can check the relevant Wikipedia pages on prostitution in e.g. Spain or the UK to see that your are misinterpreting the significance of the blue keying. It is not illegal to sell sex or to pay for sex in either of these countries (or in any of the other blue countries, as far as I’m aware).