I believe most modern smartphones have more powerful cameras than ArduCam. They're more expensive, but broken / older smartphones can be had for cheap.
There's been about 5 years now, where the common refrain is to just use a smartphone camera. And in some cases people are literally writing an app and strapping a cellphone to a drone, but it's not ideal. This arducam camera is the closest thing to an embedded cellphone camera that is actually usable in robotics.
I highly doubt any smartphone cam worth a damn and actually interface properly with the CSI bus lanes on a RasPi.
I believe the grandparent is suggesting using a smartphone in place of using a raspberry pi, not trying to extract the camera and connect it to the pi.