I disagree... they are hard. The fact that you think they are easy speaks to your own intelligence or "way your brain works" that you are able to grasp it (and/or your persistence/practice over the years of learning it).

But try teaching this stuff to people with no experience, and/or people who don't have as analytical a mind as us tech folks and you will quickly discover just how hard it can be.

(I recently taught a college class that was an intro to web design / development - suffice to say it really gave me a clearer picture of how far I'd come in my own professional skills over the years... it's easy to forget what it was like before you knew what you know now :)