Again, I have to say youre kind of missing the point. Let me reiterate the sumation of my argument.
The argument is simply that open decentralized standards are paramount to a healthy personal computing environment.
This requirement doesnt exclude a central authority or repository from vetting software, it just cant be absolute. In fact, the gnu/linux folks do this with package repositories. The difference between, say, rhel and ios is that rhel gives you administrative control to make choices, if you so desire. I have a centos7 machine at home. I can allow my wife and kids to run software updates, and install software from the official repos without giving them super user, allowing them to directly install outside packages, etc. But meanwhile, as an administrator, I can change software repositories, install non-approved packages, and ultimately have complete control over the hardware I own. A live-in sysadmin isnt required to maintain this. Once the system is set up they operate autonomously. The important aspect is that control, customization, and competition is integral to the design of the software.
Android was a good example of a platform that used to do thing quite well. Originally they were bad at keeping malware off their store, but thats more of an administrative problem. The design of the software is what im talking about. It allows for side-loading apks, third party stores, and running applications compiled for android on any system that incorporates a dalvik runtime. This is why blackberry can run android apps today. Google has tried to shift from this approach by bundling a lot of new functionality into their proprietary play services, which is only available with full Google Android branding. A sad shift in philosophy no doubt inspired by peoples apathy towards open standards.
iOS, of course, is an example of the absolute worst offender. Apps are developed using strict apple only languages and technologies, sold and installable through their store only with no exception, and heavily scrutinized with many more considerations than just filtering malware.
Ecosystem is actually a great word for computing platforms, because they work like cities. They have rules and guidlelines which form communities around them. Technical people are like the economists of cities. If theres anything economists have learned about communities its that competition and liberty are absolute requirements for a healthy one. The way Apple designs their software completely destroys the competition incentive at the platform level. It is a poisonous, ultimately doomed philosophy for software design that shouldnt be supported by those that are supposed to know better. These decisions have real measurable consequences for future generations.