I'll leave you to read the numerous SCOTUS rulings (and, for the purposes of freedom in other jurisdictions, analogous court rulings) instead of trying to explain myself.
In short: the fact that a photon bounces off of your face does not entitle you to control every person who might capture it, in perpetuity, throughout time and space.
I was born with eyes capable of a materially identical task as a CMOS sensor: must I look away any time you I see you in public? Must I refrain from remembering that I saw you? If I testify that you shot my friends and neighbors with impact munitions - a nightly occurrence in this city - will it be as reliable as if I had photographed you and compared your face to an index of known violent repressive forces in Portland?
I find this logic to be the maximal case for ego: to believe it, you have to believe that light itself is made for you alone.
> how does it protect your doing whatever you want with that photo
Do you generally dispute that people have a right to think about and process data however they wish? Must I cover my ears if a state secret is uttered by a journalist or friend? Must I refrain from thinking critically about whether it implicates a powerful person in criminal activity?
Well, isn't it the same if we, the people of Portland, seek to compile photographs of police officers who have been repeatedly abusing and terrorizing us and use them to recognize their faces?
> their right to privacy, which is clearly secured by the forth amendment?
I know of no such plausible argument being made about the faces of people appearing in public, and certainly no actual jurisprudence in the Western legal tradition.
When in public, you can be reported on. You can be photographed and recorded. If you decide to spray chemical weapons at people, you can be held accountable.