I don't believe this is true? As others have pointed out, preflight options requests only happen for non simple requests. Cors response headers are still requi

I don't believe this is true? As others have pointed out, preflight options requests only happen for non simple requests. Cors response headers are still required to read a cross domain response, but that is still a huge window for a malicious site to try to send side effectful requests to your local network devices that have some badly implemented web server running.