On top of that, but not because of the walled garden aspect: Better parental controls. Consistent user experience (although for this one it helps to have the walled garden). Better device interoperability across the ecosystem.
The walled garden is the fact that you can't sideload apps or alternative stores at all. Everything you've mentioned is simply app store requirements.
All of the benefits I listed are a result of, or helped by, the walled garden. The app store requirements are part of that walled garden.
Android is a walled garden too, up until you flip a switch and allow non-appstore apps, which most people do not do. If there were any benefits to the walled garden, they would be present on Android as well.
https://www.youtube.com/watch?v=QUYODQB_2wQ
> Fewer privacy violations
The only reason Apple booted Facebook tracking is to become the next Facebook in tracking with its ads. (1) (2)
(1) https://www.theverge.com/2022/10/26/23425637/apple-pauses-ga...
(2) https://appleinsider.com/articles/22/08/21/apple-maps-could-...
Frankly, everybody keeps saying that iPhones are e-waste. Well, without starting a flamewar. I have managed more Android e-waste for the family than Apple. Just my mother had 5 different Android phones in the last decade. 4 of them laying dead in the drawer next to me.
And that capability seems orthogonal to the App Store. I don’t see any reason we need a monopolistic app store on our phones to get good security. You don’t need anyone’s permission to make a website. Why can’t applications work the same way?
For personal use cases it’s the same. Smartphones are so advanced that there’s not that much functionality I’d get. The benefit from customizability of an Android is less than the stability and ease of access of an iPhone. Maybe ad blocking is the only issue, YT on the phone is unusable, but I have a pi-hole for my home network so I don’t mind.
I still have a rooted Android and a jail broken iPad to mess around with. But beyond some nerdy stuff or hacking a mobile game, it’s mostly a gimmick.
But we can't use a third party app on the PC (you can find plenty to install, but they all use the same underlying iTunes software), or on the phone (some WiFi media transfer apps exist but don't work well for years of bulk data), or even just browse the file system like Android. So our only option is apparently paying for iCloud to get our media off the phone now, resetting, and hopefully putting it back on - which I don't have high hopes for since we had an issue in the past where iTunes bricked a phone when restoring from backup [IIRC iTunes didn't do the right system call to stop the Windows PC from sleeping, so it slept mid-restore, and next time we plugged it in, it automatically backed up the broken partial restore wiping the good backup].
Both of which can run any software of your choice, which demonstrates that walled gardens aren't necessary for usability.