> You don't get to define what is private for me or what privacy means for me
No, but I'm sure most people see privacy in a roughly similar way. You want control over what people know about you and your life, and control over who know it. This control is being taken away from us at every turn, no matter what we do online. Most people have no idea it's happening, but most of those who do, would prefer it.
You may be perfectly fine with losing your privacy, regardless of how you might personally want to define it, but most people aren't.