It's an interesting argument even though I don't fully agree with it. The Tank Man analogy is that even though the Chinese person has not actively pursued this topic, they experience the effects of censorship because this topic has been basically erased from their cultural space. So of course they do not pursue it - they can't ("they don't have a word for it" in Orwell's terms).

However, we are not discussing censorship as a state-level concern. An app censored on iOS can still exist as a web app or as an Android app. Apple's AppStore does not encompass the entirety of our cultural narrative. On the contrary, an app banned from AppStore often generates a lot of press.

(again, anecdotal) I can't remember a single app that I have discovered on the AppStore. The process always starts with hearing about an app from someone else, or reading about it.