You are right for on-grid systems. If you can get power from the grid, it is easy to get fiber. I have friends working remotely from very rural zones in Brazil, and they got fiber for a lower price than it was for buying up the transformers/posts to route power to their farms.

But, there are still niche use cases, like ships and planes, that would pay a premium for fast LEO satellite connections. For people I know who live on islands, going from barely being able to use WhatsApp to entirely using the internet (YouTube / Netflix) is game-changing.