Is it? Would bioweapon instruction restrictions be equivalent to disallowing reporting on whether the government is massacring large numbers of citizens in your city? Both are ‘censorship’ but don’t seem remotely equivalent to me.
I should think learning about history should lead to a desire for citizens to be able to quietly make weapons at home given the many documented cases of governments across the world mass murdering their own citizens (or foreign governments invading and genociding). What's the point of telling people the wrongs of their oppressors while simultaneously disempowering them from doing anything about it or preparing to defend themselves in the future?
So yes they're not just comparable, but two sides of the same coin.
The idea that Chinese citizens could’ve prevented the Tiananmen massacre with a bunch of home printed AK-47s is silly. The government had tanks. The same applies in the US.