Yep, and in addition to not knowing what they want (at least sometimes), customers also don't generally have a detailed understanding of the costs associated with building new features. It's easy to say "I want X" if you're not the one who has to build it, integrate it into an existing platform, support it, etc.

Also, "customers" are not a monolithic group. Some will try to pull you in one direction, and others will want you to go the opposite way. You'll go crazy trying to please all of them. Just saying "listen to your customers; they'll tell you what to build" is a massive oversimplification.

At the end of the day, customer feedback can be very valuable, but only as a starting point. You have to internally decide which of the things, if any, you actually want to build.

But if you wrote a blog post that said: "listen to your customers and consider building what they ask for", it would sound obvious (because it is) and wouldn't drive any clicks.