I think she panicked a little bit. She was asked the question, and thought, “Oh shit, this is what fucked Clinton,” and didn’t want to leave any doubt in WV residents’ minds that she was going to take their jobs away, so she gave a clear, no-bullshit answer.
Obviously yes, it would be preferable that the overwhelming opposition to fracking from most of the rest of the country was enough to offset one very small, backwards state’s fears, but that’s not the country we live in right now. Maybe in the future.
The problem with this is that it requires people in power to vote to limit their own power. And while there have been some, certainly, who have been willing to do so, getting a supermajority of people willing to do it is simply not something I see as remotely possible anymore.