Well let us look at where the major fights that would be most notable were fought.
Storm Front. An isolated home on the shores of Lake Michigan.
Fool Moon. A private estate.
Grave Peril. Bianca's estate.
Summer Knight. The Stone Table
Death Masks. Atop a moving train outside Chicago.
Blood Rites. Raith Deeps
Dead Beat. In a park, near a school, at night, after a long blackout.
Proven Guilty. Arctis Tor
White Knight. Raith Deeps
Small Favor. Demonreach
Turn Coat. Scotland and Demonreach.
Changes. Chichen Itza
Cold Days. Demonreach
Skin Game. Hades vault
Secondary fights take place at isolated venues.
The elevator in Harry's office building, Fool Moon garage, the basement of the Red Cross(?), Walmart at midnight in a mind fog, in a boat at Burnham Harbor, at Wrigley fields after closing, a porn set, a warehouse on the waterfront, the Shedd Aquarium at night during a blizzard, and a meat packing plant. The train station in a myrk. There are others but all are isolated and mostly at night or indoors. JB has been paying attention to the march of progress. And he reuses places that he describes as driving off people. A lot.
In addition Harry and his allies use guns. Also swords. And with the exception of his fire magic his spells don't generate big, flashy, visual cues. And so on. He's given it some thought. And for the most part it's pretty consistent. Also we have a bias to think cameras are everywhere. However there were over a hundred murders in my location and none of them have ever been caught on video. And they were killed for the most part in public places. Rest easy though, JB is gonna amp it up,