I think I'm finally getting it.
You see my friends, it's all about control. And not just control, but effortless control. So effortless, in fact, that it becomes a habit -- requires little to no thinking. Yet you have the perfect control.
I used to practice/noodle on my guitar for hours, but you know what I did? I played faster than the rate I could control. I'd make mistakes and noises all over the place. And when I perform, I still play that way.
The way to get better is to practice playing effortlessly. Slow down to the point where I have perfect control over ever aspect. Repeat, practice. Soon the effort becomes effortless. Then, and only then, I can speed it up to a point, but only to a point where I am still maintaining that perfect, effortless control.