I guess this is more a rhetorical question as taking pictures with a back facing camera is an extreme^10 edge case while doing video calls with the FaceTime camera for most users is a daily or at least weekly occurrence.
It’s not that I don’t think the criticism is valid about the camera, it’s just the idea of saying it should have the same hardware as a phone
Why not? Apple sells ~200M iPhones a year, so they already are ordering millions of FaceTime cameras for the iPhones. Why not buy 10M more of the same model and put them in the MacBooks?