When you are resistant to change, you are setting yourself up for failure. In today's reality of constant updates and shifts in the technological culture, you must be hyper-adaptive. Making Yourself Irreplaceable is all about being confident in your ability to readjust along the way.
The days when you could know everything there was about a subject are now over. If you are tops in your chosen profession-coach, lawyer, doctor, etc., you better be good at figuring new things out while resisting the urge to slow down because of a little confusion.
Those that can thrive in a state of confusion will be the new intellectuals.