I think if you read the EULA you'll be sadly disillusioned about your rights to use the APIs. You may own the silicon, but you're renting the OS.

I wish there was an amazing desktop / mobile Linux. (Maybe next year lol)

Maybe voice / brainwave powered AI will be able to translate our needs into shell commands which then goes into our contact lens supercomputer running Stallman-approved Linux.

The EULA is probably unconscionable even under the usually contract-friendly US legal system. iOS is already on the phone even before the contract is presented to the user, and per precedent the user has the inherent legal right to use software that comes with purchased hardware.