That said, Apple seems to be more targeted now precisely ( compared to non-Apple linux and Windows ) because it has more people, who are lulled by the sense of security Apple curation model provides.
edit: I kinda get that the article is mostly about mobile devices, but the app-store concept appears to have moved to desktop world as well.
This post is very manipulative in my view. It would be really easy to avoid that for the authors - just list the downsides of allowing any app to be installed on an iPhone. What are the consequences of allowing your parent to install "Bank of Amerika" on their phone? Exactly.
I think the main question I see is - do multiple stores benefit the user?
I'm not sure of that answer but I think we can agree that multiple stores do NOT help the default app store, which in turn could be beneficial to the consumer (multiple stores that have to compete on pricing w/ deals, self publishers offering a cheaper price directly, etc. - think more like grocery stores selling the same stuff vs farmers market vs direct from farm).
I'm no economist but I think we could also agree that having at least a few options is generally A Good Thing.
edit: regardless, even in a world with multiple stores the point re: attack surface is a good one and one of your other comments regarding what users actually value like safety is an important one, which as a business are the things you need to weigh on to make a profit
1. Less trusted software. Can I trust Russian Yandex app store? Can I trust Amazon app store?
2. Focus on upselling their own / affiliated apps.
3. No actual increase in choice. Some devices just come preinstalled with alternative stores for no other reason than their own monetary benefit.
4. A theoretical benefit that "I have choice" and if someone bans something I _might_ be able to install it from a different store. Of course oppressive regimes don't just ban apps, they often restrict internet in more severe ways.