From an economic perspective, rural areas are still highly connected and interdependent - think roads, infrastructure, food, water, electricity, internet, transport networks. Those who move from cities to rural areas to "escape the demands of the high-interdependency core" simply shift from majority "producing" to majority "receiving" benefits from our interdependent society.
I'm a huge fan of rural living, but it is expensive. We as a society have decided to subsidize it to various degrees. I'm OK with this, but also think cheap, individual solutions should be used when feasible. For example, sewer lines are very expensive in rural areas, so most houses maintain their own septic tank. Rural houses often use a Propane tank they refill rather than a gas line hookup. They often have their own well for water. Thus, the high grid-connection fees in the article make sense, as rural residents can just build their own off-grid electricity production.