It doesn't matter how "good" the product is if you're not talking to the users and uncovering their need for it. What you've said here doesn't contradict the point of the article - determining an unarticulated need and meeting it is the true measure of how a successful product is built. The fact that you can easily trivialize something successful's true purpose, without doing the legwork to find out what need it's meeting is the logical fallacy enforced by failing copycat products.