The GF problem as I see it is lack of existing pole rights compared to their competitors and lack of existing community relationships for permits compared to their competitors.
Example - CenturyLink has aerial cable in alleyways throughout Denver proper and throughout the surrounding suburbs. Massive amounts of copper cable strung up on strand. I worked for a contractor who engineered and build new fiber which simply spun up to the existing copper facilities. Nothing else was required. No new permits. No new anchors or guys or poles or anything.
GF needs to CREATE ROOM on poles before they can put their fiber up. Massive headache. As for buried that is closer to an even playing field. But the legacy companies have relationships in place to provide permits and whatever is needed to get the job done. GF doesn't.