I think the answer to the question what's the point is to notice that there's a bit of a rhetorical trick going on. Notice how they say (in passive voice) proposes building a national Domain Name System to allow the internet to continue functioning even if the country is cut off from foreign infrastructure. So you're trying to analyze this as if a foreign country tries to cut Russia off from the internet. The Russian government has an interest of its own in cutting itself off from the internet to control its own citizens' speech on the internet, it's just that it's a little bit cynical to imagine it and it wouldn't be balanced to mention it explicitly in a news article.