So, my question is not on the distinction but it's about the association of "Cryptocurrency as word" with Bitcoin. 

My link isn't objecting but there are many who do.
TBH, most of the articles where I see the word 'cryptocurrency', I too don't like them but this is just a generalised term. 

Most of the stackers would not like 'cryptocurrency' as word. 

IamSINGLE

bitcoin_beginners

"Bitcoin is not cryptocurrency". Why?

This is in your link:

> The same cannot be said about **any other cryptocurrency**.

So your link is not objecting to calling bitcoin a cryptocurrency, because it literally calls bitcoin a cryptocurrency.

> I see a lot of comments everywhere insisting "Bitcoin not crypto"

Didn't your link already explain why and what is meant with that phrase? It doesn't mean that bitcoin doesn't use cryptography, it means it's not like any other cryptocurrency.