The government isn't dictating which books are allowed to be published, it's arguing (amongst other things) that self publishing books should be possible, which

The government isn't dictating which books are allowed to be published, it's arguing (amongst other things) that self publishing books should be possible, which it is. Being a successful smartphone manufacturer (or a smartphone OS manufacturer), shouldn't give you a monopoly on software distribution, that's the entire point. And even the Kindle, which doesn't have the market relevance of iOS, isn't as locked down as iOS: the Kindle does support reading ebooks from other sources, they just don't support DRM from other stores.