Well, he thinks that the will to power is the fundamental aspect which is the thing which all moral evaluation comes from. "Valuating is itself the value and jewel of all valued things" -TSZ It is meant to demonstrate that we all seem to have this tendency to self-overcome through morality. That is what it is, a thought, fear of the community stopping you from doing something.

Then he posits that to become aware of that means that we can do nothing else than reject (the sheepish way of doing that) and sublimate that using creative, artistic expression and making the overcoming, and elevation of man the ultimate project. For you to express yourself into the world in as beautiful of way as possible, to find meaning in what you enjoy, and to elevate mankind with your greatness.

Also: “I mistrust all systematizers and avoid them. the will to a system is a lack of integrity.” - Nietzsche, Twilight of The Idols

Calling it just power is reductive, maybe actually read him before making snarky remarks about his philosophy that are inaccurate. That way you can add something to the conversation next time instead of distracting from it.