What they've already tried. What disappointed them. What's currently broken in their life. What they're ready to believe.
There is no single clean explanation that works for everyone. The version that makes it click for you won't be the one that makes it click for me.
Here's the tension: The most valuable thing to build is a system. The easiest thing to understand is a tool.
Systems require patience and perspective. Tools are obvious and immediate.
We're trying to build systems in a world trained to look for tools.