Think of it as if philips screwdriver producer forbid using those screwdrivers with posidriv heads (it is less efficient but works).
And there would be those that would say: "this is their product, they can dictate how it can be used".
If I bought a system that I am technically able to install anything I want onto, I don't think courts should enforce a EULA that forbids me from doing so.
But that doesn't mean I think the courts should forbid the manufacturer from implementing technical controls to stop unapproved software from being installed.
Those are two very different things, and the courts should treat them differently.
For one, there are consumers who buy iOS devices explicitly because they are hardened against unapproved software. Comparing the amount of malware on Android with what is on iOS proves that this is not an irrational decision.
I don't choose to buy a device like that, but I don't want courts saying that companies are not legally allowed to make such devices.
I don't buy a Phillips screwdriver expecting it to work on a Robertson head because I think it should fit every case.
I still amazes me that people don't have problem with computer hardware+software being closed, enforced, EULA driven.
And at the same time they expect to be able to e.g. use knife to open a box and not only cut bread (enforced by EULA).
This is similar to what is happening right now with the right to repair of tractors.
That's not the fault of the company that designed, manufactured, and sold the screwdriver, though.
But they won't stop me from doing that either. But they did design the Phillips screwdriver to work optimally with Phillips head screws, so that's what I actually bought it for and use it for.
The EULA doesn't prevent you from wiping your iPhone and doing anything with it. It's your hardware. You won't see any warranty help after that, but that's not their problem at that stage. You can even try to use your iPhone as a hammer, but I wouldn't recommend that either. It wasn't designed that way, but you're totally free to do so.
Personally, I bought my phone to use it the way it was designed, because I liked the design—not in spite of it.