The augment put forth is partly that an app store / hub not accepting all possible apps is a form of censorship, but simultaneously asserts that that there are too many apps and an app store that doesn't accept all apps is providing a "curation" service that is beneficial to the user.
Maybe they are trying to make a delineation between a large scale app store and a small scale app store, but the point doesn't feel well defined or fleshed out.
Unsure what was meant by the statement "The freedom to get apps will always be in tension with the things that people want to keep out of their life"... applications being available to install doesn't mean you have to install them.
I agree that the iOS App Store and Google Play store enjoy a monopoly over much of the world, but I don't see that China has a less censored market. I understand China to have far greater government censorship over the internet and their applications than most other regions, so having a more even market share over multiple app stores doesn't necessarily improve the censorship issue.