This is exactly why the biggest thing in gamedev, and all software dev to an extent, is getting your software in front of users as soon as possible. As a developer it isn't just that you know how it works, but you'll also have played the game or used the front end of the experience for thousands of hours.

New eyes will see fresh flaws. The user might not be right about how to fix the flaw, but they are absolutely right about where the flaws are.