Customers talk. In forums, communities, review sites, on social media. They describe what convinced them, what frustrated them, what was missing. That happens every day, whether you listen or not.
The problem is not that you get no feedback. The problem is that you only see a fraction of it. The unhappy customer who writes. The delighted one who refers you on. Everything in between stays invisible.
And that is exactly where the decisions you get wrong today are hiding.