> there are other places we can get it cheaper.
You might be able to /get/ it cheaper elsewhere, but factor in the cost of transport and you lose. The northeast is the largest consumer of natural gas in the US. Lots of gas exists in the west. Transporting that gas costs money. That's why there's a large price differential in the price of natural gas between those two geographies. And that's what makes Marcellus so valuable: it's close to the demand center.
> your fossil fuel ideas wont work here
The post you're replying to isn't arguing that gas is the be-all-and-end-all solution for energy. He's stating that in his area, the local economy is boosted, and this is a Good Thing. Local economies are often cyclical, and not participating in an industry because it will (will, not might) go away some day does not seem like a good reason not to support it.