I've come to the conclusion that nothing is simple. Nothing. It's only "simple" because thousands of years of work were applied to get us to where we are today and we are building on top of that. It's arrogant to think anything is simple.
Just to build a key cap for this laptop I'm typing on, very difficult if I actually had to do that. I need to use tools that were ultimately kicked off by stone age men thousands of years ago that progressed by building tools with those tools until we go to the point today where we can create a key cap for a laptop.