> but they sure as shit don’t own it once they sell it to me.

Are you really sure about that? Apple can, at any time, and without any permission from you, remotely access your device and make changes including :

  reverting settings you've intentionally configured
  Adding software
  Removing software
  Changing the way already installed software works
  Disable features you're using
  Enable features you don't want 
  View/modify/delete "your" files 
  Restrict your access to access certain files/features/software 
  Brick your entire device

In what way really is the cell phone in your pocket "yours"? Your ability to use a cell phone you paid for is entirely dependent a company granting you permission and you are totally powerless to prevent them from revoking that permission if they wanted to.

"Your" device is already filled with encrypted storage and software you can't access but others can, along with chips from companies like Intel, Qualcomm, Broadcom, etc. that you cannot access, modify, or control but which can be remotely accessed to execute code on "your" device or transmit data collected from "your device" without your knowledge or consent

It really doesn't matter if your phone is apple or android. Under no sane definition of "ownership" do you own your cell phone. You are, at best, a low privileged user of someone else's system. It doesn't matter how benevolent the true owners of "your" cell phone are. It doesn't matter if they've never cut you off from your device entirely, or if every update they've ever silently installed has been something you approved of after the fact. It doesn't matter if they never do anything you object to with their device. It's still their device. They allow you to use it after you paid for it because it's profitable for them that you do use it and for no other reason.

Sure, your cell phone manufacture can't come into your home and take the brick of plastic metal and glass you paid for away from you, but it doesn't matter because they don't have to do that. They can take all of it's functionality away from you without ever physically touching it and if they ever do it'll be left useless to you for anything other than scrap or parts.