A hearing is not a trial. Why don't we elect representatives who can ask the hard questions for us and compel the tech companies to provide us the information

A hearing is not a trial. Why don't we elect representatives who can ask the hard questions for us and compel the tech companies to provide us the information necessary to make informed decisions on whether we should be concerned or if we do have reason to be concerned. Maybe we could even compel Facebook to answer our question with the threat of jail if they lie. What is wrong with this idea? Seems like a very democratic and completely appropriate thing to do in a representative democracy. I am starting to get the sense that a lot of technologists skipped the section on civics, didn't learn about it or simply don't care how it works.