Somebody should tell that to the multi-billion dollar a year industry that sprung up over the buying and selling of the most mundane details of our lives. Or maybe they should ask why basically every company everywhere spends so much time and money collecting, storing, and managing far more data on their customers (and anyone else they can) than they actually need to conduct their business. Companies don't usually like spending a bunch of resources for zero reason. The idea that "your data isn't worth anything" is demonstrably false. Your data is so valuable that it's making companies money hand over fist, and most of it that is at your expense.