IF Natals is about assembling a specific curriculum for your life then your North and South Node are what sets its path.
What is your purpose? Why are you here? How do you know you are on track?
Lets take a step back for a second. If you didn't have some idea what path you should take to get to your current position in IT would it be intelligent to expect it to just happen for your LIFE without asking "where am I going" and "what is required"?
What kinds of issues could you expect to arise if you failed to do that?
So to what extent is asking "where am I going" "what is required" to ensure your life plan is on track.. important? What kinds of problems do you notice people you know around you are having for failing to ask that?