That's simply not true in my direct experience. I built a WISP back in the day, and although I don't have customers now, I still use the backhaul network to feed my office (typing this over that network). I have Starlink as a backup. Starlink is about as fast as my fixed wireless terrestrial link. It's often faster for download, and about 2/3 as fast for upload. Way, way faster than dialup and DSL.
