Everyone Notice That You're Unprepared

When you haven't done all that you can to prepare it's noticeable. People notice that you don't know the right answers to the questions and that you're making it up as you go. People notice that you didn't really do all that you could to prepare the home for sale. And people notice that you didn't study up on the issues before going to market. If everyone notices, then why do we continue to be unprepared for things that should have our undivided attention?