Confirmation of anything from the American State Department has as much legitimacy as used toilet paper. Literally "EVERY" single so-called confirmation of "concentration camps" in Xinjiang via satellite imagery, that was actually fact checked on the ground, turned out to be some variation of a shopping center, hospital, school or apartment building. Don't believe everything you read, especially if it's from the American government, or should we say "regime". They are the greatest bullsh*t artists of all time.
Note the reporting agencies, The Economist and Washington Times. No surprise there.
I understand the sentiment.
But what would be the purpose of telling the US population and US policymakers that China has a huge nuclear arsenal?
If China isn't building nuclear silos, then the State Department and Pentagon look utterly incompetent and stupid to the American people, when the truth comes out and we see wind turbines.
It also means US policymakers overestimate China's nuclear arsenal, which deters the US from using conventional force. Neutral countries in Asia can also see how the USA is unreliable, because the US will not go to war against China because of the risk of nuclear armageddon.
Furthermore, China now has a free pass to actually build 350 nuclear silos (which could cause nuclear armageddon against the US) because everyone in the US thinks China has already built them. That is not in the interests of the USA.