I want privacy too but I don't think the 4th amendment is enough. The 4th amendment effectively covers what's in your house. It does not cover people and business outside your house. If you interact with someone else, they also have a right to use/remember the fact that you interacted with them, whether that's your family, friends, or some random business. You call someone on the phone, 3 parties are involved, you, the person you're calling, the company(s) you paid to make the call possible.