This is a ridiculous statement considering the camera we're talking about is 720p. The current camera is indeed better than "no integrated camera at all" and is perfectly fine for video calls with your family, or even for work, since you're probably sharing your screen and your coworkers don't need to see every pore on your face.
Perhaps they never got the levels of feedback that drove them to upgrade it. Perhaps it has to do with internal designs of using an USB 2.0 bus or something that now has to be changed to a CSI or MIPI style interface that first has to be processed by something like the T2 before it is a readable data stream for the standard Intel architecture.
They probably won't be able to fit the exact same iPhone module, the optics (Be it plastic or glass lenses) are too deep, but you could probably do with a better sensor for sure. Some manufacturers tried to 'fix' this by putting the camera below the screen which gives it a bit more space because you can then use the hinge area for the components; but now you end up looking at someone's chin all the time.
We simply don't know.
