In short the integrity of the application must be secured. This integrity must be protected from everyone. Nothing should be able to violate the integrity of the app.

>I absolutely want the ability to lift that isolation in specific cases.

There is no need for this. Allowing end users to turn off security features is not a good idea. Users should not have to think about such things.

>I decide when and how the rules are broken.

Most users do not want this ability. They just want a computer that works and is safe to use. They don't want to dictate how exactly it was written. That is the manufacturers job.