Well, Apple will have to redesign their security model, then. If the iPhone relies on Apple's white-glove curation to stay secure, then European users are enough of a reason to overhaul their security model.

It's great that you know how to sideload, I'm not saying everyone has to know how. I'm arguing that the option should exist regardless of if you pay for a $99/year subscription fee. It should be a part of owning the hardware you paid for and purchasing the right to control it as the user.