It works "well enough". There will always be a 1% or 0.1% of the population who will be able to circumvent the blockaid, and China will keep arresting the one

It works "well enough". There will always be a 1% or 0.1% of the population who will be able to circumvent the blockaid, and China will keep arresting the ones it catches in the act. But the point is it works for the other 99%. The thing about censorship is that you don't know what you were supposed to know. 1% of the population may see those censored articles before the governments gets around to censoring them, but what about the rest of the population? They'll keep living in ignorance of what was revealed and think the government is still great (with some help with the 24/7 propaganda bombardment from the media). This is also like saying "(in-app) ad-blocking works on Android" - if you know how to root your phone and install it from F-Droid. But for the vast majority of people it doesn't.