This is exactly correct: because average users are dumb, it is our duty as software developers to make decisions for them, and to use whatever practical encryption or legal copyright means available to us to ensure that users do not have the ability--by any means that could plausibly be under the control of the user--to access and modify (or even see!) the behavior of the software running on the hardware they think they "own"... anything less would be devastating for security and is too scary to contemplate.