apologies yes there is a wording error here, the correct wording is no CORS proxy, the reason why this is important is because cors proxies are inherently insecure (this is different because the TLS is done in your browser with a webassembly library).

no servers is referring to you not needing to host servers in the same as the term "serverless". Such is the ways of modern tech terms I fear

Seems easy to fix it and say 'no CORS proxy' and 'no need to host your own server'. It was very confusing to me too.