> The server that delivers the page never receives the content, never knows which site you are viewing, and has no way to find out.

Technically true, practically a lie. Because that server delivers the Javascript which decodes and presents the content, and that Javascript absolutely has the ability to inspect, modify/censor, and leak the content (along with fingerprints of the browser).

> no host to pressure, no platform that can decide your content should not exist.

Except for https://nowhr.xyz, which becomes a single point of failure for all of these sites...

You download the app in case that site goes down.