The Fahrenheit 451 analogy sort of falls apart though when they give open access to the internet via Safari. What Apple does with the App Store is maintain a safe & friendly environment for users, where they can trust they won't run into things like viruses or pornography. This creates a healthy market for developers who don't necessarily have the notoriety of a Netflix / Spotify / Amazon to push their product, and instead rely at least somewhat on organic App Store searches to be discovered.

So if these larger companies want to bypass that sales funnel, and they can afford to do so, it's not a huge deal. They're still providing value to the platform in making iOS a better experience. The 30% cut is something along the lines of "Hey, we spend a lot of time maintaining this market place so that users will trust the download button, and we're giving you this opportunity to benefit from that by paying us a cut so you too can benefit from being found organically via our curated market place."

From the standpoint of a fledgling app company, I'd rather pay them to maintain that sales funnel for me. Whereas a Netflix / Amazon already has the brand strength to where they don't need it, so the 30% is very expensive for them (because they can generate plenty of sales on their own, and aren't reliant on organic searches for users to discover their product).

On Google Play, the market is very different and since it's not curated, there is so much more fluff to sift through for users, and it makes it much harder for a brand to gain notoriety through Google Play alone -- hence why so many new app products start on iOS and then grow into Android. The sales funnel created by any non-curated market place will never be as strong as a curated one (assuming the curation is carried out in the interest of promoting welfare of the customers/users on the platform, their privacy, safety, satisfaction, etc.).