The day apple, microsoft or google would manage updates of a whole system as well as some linux distribution would actually be the end of many user nightmares.

Unless you don't install any app, you still trust all the developers of the apps you install. Walled garden is just a nice way to name Authoritarianism applied to a platform.

It might make you feel safe to have apple deciding every bits of what you can do with your phone but it does mean that: - it's secure - the apps you are using are - you still have very low control over your data.

You just pay to close your eyes and feel safe.

That’s true of all closed source software, not just walled gardens. Any time you don’t have the source, you’re trusting that the developer isn’t screwing you over.

I’d rather trust Apple than the cumulative two dozen developers that have their software running on my phone.

Or to put it another way, Apple provides systems administrator services with every phone. Most medium and large businesses pay a LOT of money for systems administration to ensure that their desktops and laptops work reliably.