> Discourse serves up a page with JS disabled. Try it!

The only content is in a <noscript> tag, so this complaint is probably coming from people only blocking third party JS.

When reading a random Discourse forum I don't intend to participate in, blocking all JS usually results in a smoother experience than accepting scripts from discourse-cdn.com. The only exception I've found is for massive threads, because there's no JS-free search.