"notability" means there are peer-reviewed/editorially controlled articles on the topic.
So, if I wanted to write an article on Gas Town, I couldn't. It got a lot of technical blogs and Arxiv preprints written about it by experts, but it won't be notable.
There has to be some mechanism of determining what should and shouldn't be usable as a source.
Ideological purity is enforced by the reliable source standard, not the notability standard. The Daily Stormer is unquestionably notable. And it has a wikipedia page: https://en.wikipedia.org/wiki/The_Daily_Stormer
> I think the notability standard is way too strict and gives way too much weight to main stream media sources as the blessed arbiters of what is notable.
They're saying that main stream media sources are what can be used to define something is notable or not. The question isn't "Is the Daily Stormer" notable (it is), it's should the daily stormer be usable as a source to determine if something is notable or not (it shouldn't be, obviously).