You are describing a creator bias, there are probably a better name, where you think the ones who created something knows it best. For example, you could create

You are describing a creator bias, there are probably a better name, where you think the ones who created something knows it best. For example, you could create a programming language, a game, or anything, and you think that you know it better then someone who use it for several hours every day. The larger the user base the less likely you are better or know it better then all users.