Modern Orthodoxy does not seek to shelter itself from the outside world. It believes that since we will have to interact with it, it is better to understand it, and know how to deal with it. Chareidi Judaism believes it’s better to shield yourself from the world, and not expose yourself to the temptations that are out there.
I don’t really understand what you mean by ‘interacting, understanding and dealing’ with the Modern World. What does that involve? Does this mean socializing with the outside world, having televisions, being part of the western culture (showbiz etc.)?