Centurylink ran fiber down the nearest highway to my rural Oregon property a couple of months before Starlink became available. AFAIK the timing was more coincidence than anything, but you're entirely right about the logistics of fiber being non-trivial. As usual, last mile is the hardest part. Even with fiber at the highway, the only service Centurylink would offer us was 10Mbps DSL. I bet they would have tun fiver to my house for $$$$$, but Starlink is plenty fast and it would almost certainly take a decade or more to recoup the one-time costs of getting fiber installed all the way to my house.