experience

I hardly remember the titles of few last books I have read. Even less about their authors. I might even not remember the plot of those books.

When I'm reading fiction  I don't care about such things. Its not a huge loss for me to forget details. I read for the moment. Its an entertainment for me, a way to pass time.

Everything is easy after you have done it enough times. You learn to do it without thinking, in the most efficient way. While seeing you do it others might think it's easy as well after seeing how effortlessly you do it.

You might lose the relativity after becoming so accustomed to do something complex. Telling others it's easy when you know what to do and then trying to show and teach them might reveal a surprise. No, they are not incompetent! They just don't have your experience.

There are times people come to me at work, after trying everything I'm their only hope. After a moment listening to their problem and then running a couple of commands the issue is magically gone. They are left in awe, wondering how I did it. 

Another time there is an issue on some server. I log in, and once again run a few commands. Everything is back up and running smoothly. Others hardly had time to react to the alerts at all before it was already resolved.