I can see that, but objective thought isn't always witty.
Discussion
Of course. I'm not discounting its value. But if I wanted to explain the philosophical position to someone Nietzsche is a lot more quotable.
Quotations don't equal a coherent belief system.
They can reflect one and often stick around in the mind and keep someone thinking, more likely to read further. There's value in short, quotable, thought provoking wisdom.