FTTH infrastructure is very low maintenance once built, its mostly passive fiber optic cables that don't degrade. The electronics on either end last a long time too.

The issue with FTTH is the build can be very expensive, you need to either work with an existing utility or dig trenches through an entire neighborhood, and each end user install is a mini construction project.

Thats why community FTTH makes a lot of sense, a small team does that negotiation with the utility, and uses that to be build a business case.