Buy a more open phone if you want one, but stop trying to use legal means to force the software on my phone to be worse for my use-case just because you want to have your cake and eat it too.
You can keep your device enslaved to Apple all you want. You don't have to use the administrator permissions on Windows if you don't want them. Some of us do want freedom
You've got it completely backwards that having the option to control your hardware means you, as an individual, are impacted by anything at all if you don't want to administrate your own device
This is doubly a concern because phones are broadly much more easy to steal/lose than your computer. Additionally enabling FDE on my computer is not a big deal, but doing a full decrypt of my phone every time I wanted to open it would be onerous.
Mobile phones are just fundamentally different devices from desktops. I want my desktop to be open (and secure, but lean towards open). I want my phone to be secure and functional.