Occasionally you will find that you don't know your vehicle as well as you thought you did. When things go wrong you can start getting into some rather awkward positions.
Driving with control means that YOU are in charge, and as soon as things go wrong, you can stop, assess the situation and take the appropriate measures.
Driving with control means that you can inch your way over an awkward ledge, and not just bounce down, fingers crossed and hoping for the best.
Driving with control means that if the vehicle starts to lean over, you can stop and back up, rather than panic and freeze while the car rolls over.