Nope, that is not the problem, the problem is COST! If there is build mass transportation for every rural towns, that would equal to 10 cadillacs for every residents, is that justificable?
Seriously, there are small town about 20 miles southwest from me, has about 100 riders rides back and forth each day, and the bus company decide to cut that route, know why? It cost them 300,000 dollars each year to support that route, that is after the fare was collected! That is just for 4 round trips each day. So, that could mean each of these riders gets free $30,000 worth of car each year.
You have to THINK the long term cost, That is why no one wants to deal with this. You can't just focus on the energy itself, you need to focus on inital purchase, initial cost to build, long term maintenance cost, labor, management cost, etc, etc, etc. Where it is really generally very very very cheap for each of us in rural town to own their vehicles.