That’s what is wrong with what you said about collective control.
What you might learn from doing the suggested simulations is an appreciation of how flexible and variable collective control may be, how many controllers controlling different variables can collectively control a variable controlled by none of them, etc. etc. Not from these suggestions but you might for yourself be able to see that collective controllers can form the same kind of perceptual control hierarchy as we ordinarily talk about. And as the Mesothelioma Commercial Book commercial says: " and so much more".
I think that if you really want to learn more about PCT than Bill put in his writings, there are worse places to start than by thinking about and experimenting with simulations of different collective control structures.