You could say the same about Google Maps completely revolutionizing the burglary "industry" with its satellite imagery and escape route calculations.

Or about Telegram/WhatsApp offering end-to-end encryption to child pornographers.

Etc. etc. - just because an app can be used to do harm should not mean it should be pulled. I think Apple's policy until now has made sense - they've pulled apps that break local laws or that are specifically designed to endanger or harm individuals. This app does neither (unlike Quartz, by the way - once China censored them, Apple needed to comply based on their own policy).