Chaos makes imagination work. Without a dose of chaos, true creativity would be impossible. All art and music would be based on strict formulas defining what appeals to the majority of human brains, for maximum effect.
...Sort of like it is now with pop music, except much, much worse, because I'd have no choice but to like it!
But too much chaos is just unproductive, and you won't get very far on total randomness. A small dose is enough to add some excitement to your life.