The ways to make it available involve stringing hundreds of miles of line. Of course it's possible, it's just prohibitively expensive because of the extremely low density.
Fiber costs far less than $15k on average and it is as good as new after 10 years.
In some places the cost could easily be over $15k per home passed.
Most consumers can’t or won’t pay the outlay up front, but that’s why you use financing.