Remember, with all Apple products, you own the hardware, not the software. We are strictly licensed to use their software.
This is a common misconception, one that large software (and media) companies have leveraged for decades now, as well as the misnomer that an EULA is some how a real contract at the same level as a formal agreement that businesses enter into with other businesses.
We, private users, do not own the IP that the software represents, but we do own copies of that IP that lives within that which we own (whether a mobile device, a USB stick, an optical disc, a desktop/laptop hard drive, etc), just as how we do not own the master for an album or negatives for a film, but the copy we purchased belongs to us, which exists within the private domain of the user.
People have always had the right to tinker and modify that which they own. This is why jail-breaking and rooting has ultimately been deemed perfectly legal (even though some companies have tried their damnedest to misrepresent and spin false narratives previously in court to judges they knew did not have a firm understanding of technology.) This right has long been protected at the Constitutional level in the United States (e.g.,
First Sale Doctrine, among other provisions), and similarly in many other developed countries.
Apple either wouldn't have existed or have been able to get far with the attitude that they've displayed in the past few years. We certainly wouldn't have had the Apple II as we knew it. Companies can frankly say whatever they want and write whatever they wish in EULAs, but they cannot change what is granted as higher levels, nor can they enforce anything beyond what is already deemed illegal by law, no matter how much they sometimes pretend otherwise.