One thing Eric Berger does not go into is bandwidth. There is a hell of a lot more bandwidth available in a single pair of optical fibers on the ground compared to SpaceX' fastest ground to air links.
They claim 1Tb/s for V3 starlink satelites. If that's true, a fiber pair provides at least 20 times that with utterly normal off the shelf DWDM components. And that's a single pair of fibers. Optical cables are often lain with 144 fibers, or 288 fibers.