Note also that while the iPhone 16 Pro can shoot at 4K/120fps, that's only on its wide ("Fusion") camera. Needless to say, there are plenty of scenarios where a pro might want to capture long-range ...
The Pro also has a 48-megapixel sensor versus the regular 16 which has a 12-megapixel sensor — this means the Pro can capture more light and provide greater detail, especially in lower-light ...