That data may be trash to you but to a sociologist, to an economist, to an epidemiologist, to an anthropologist, to a historian, to a city planner, to a property developer, to an investment firm, to an insurance company, to a kinesiologist and on and on... it's TREASURE.
Then don't install a Twitch streaming video camera in your bathroom. And don't order a custom t-shirt with your banking password printed across the chest. This isn't rocket science.
If you're out and about in view of others, you don't have privacy. By definition of what we call "privacy" that is the exact opposite of privacy.