I'm curious to see what you mean, but the link goes to "The Challenges of Getting to Mars" which doesn't show any example of visual programming by controls engineers?
I don't have access to JPL's models obviously, but here's a simple student project 'reverse engineering' the rovers in some of the same tools JPL uses. Note the control diagrams towards the end. These are the very same languages that are used to design & program in all but a handful of cars, are used by every plane manufacturer, to name a few applications
