The iPhone 16 camera control button is a worse shutter button.
Took my kids go-karting this past weekend, and since I was far away, I used the 5x telephoto zoom to capture some photos. Not only did I not use the camera control button to snap photos, but I purposely avoided it (which is very easy to do).
5x zoom is already a bit unstable when it comes to taking photos, and to add more instability with the physical shutter button would have resulted in worse photos than just touching the screen.
Buy this phone for the great camera, not for the lackluster camera button.