I agree that malware and such should be dealt with but at the expense of your own property rights is far too far.

Secondly, if apple just allowed loading your own signing key it’s not like malware writers can sign their crap with their own key, and expect it to run.

What is malware to you, and what is malware to Apple, can and will disagree.

It is extralegal though. The boot-rom will enforce these restrictions, and you don’t have to agree to the iOS TOS to buy an iDevice. Further, one may want to use the device without iOS.

Extralegal just means outside of the scope of law or a legal framework. Here apple using cryptography starting from the boot loader to effectively retain the right of exclusion regarding what code may or may not run on the ARM CPU. The sale of the tangible property should include the right of exclusion to the buyer short of a legal agreement at the time of sale allowing the seller to retain some rights. Thats why its extralegal there is no contract just apple using public key cryptography in rather hostile manner that diminishes the property rights of buyers.

Here is a simple test if you have to ask 3rd party to do something with something you “own” you don’t fully own it or your rights are diminished in some manner.

This is a big misconception. Sideloading doesn’t imply that app isolation (sandboxing) is also going away, nor does it imply that any app would ever be able to trick the user into running it with escalated privileges (sudo/root) as is the case on most computers.

We’re not talking about going back to the old Windows security model where you were always one wrong click away from damaging other apps or the OS, or having your data stolen.