You are only aware of your own sales or investor pitch. Your audience (investors, clients) sit through dozens of them. After 10 sales or investor pitches in a certain industry, they probably understood the key industry trends, and in their heads they are wondering how you are different from the others.
Have the "101" slides ready, but the body language of your audience should tell you whether you are the first presentation they are watching, or number 12.
Image by Malcolm Carlow