Frankly, it's because the people in the affected communities have the democratic-republican right to say no. They also have the right to say that their democratic-republican rights should be fought for against the "million-dollars-million-votes" crowd. The "countries that hate us" generally suffer under un-/anti-democratic regimes. Should we give up our way of life to compete with captive populations in how much freedom and democracy we're willing to give up?
As far as the revenue from coal, fracking, and tar sands goes, that's not revenue for the demand-side depression we're suffering right now. It's a relative handful of jobs, at most, and the oil industry is notorious at not allowing any consumer surplus to ever slip through its fingers. An increase in production is not a gain for the rest of us.
From a strictly geopolitical point of view, the price of oil will continue trending up, so the longer we wait to tap our local resources (and also take on the cost of the toxic and climatic results compared to more traditional petroleum reserves), the better for us. We develop alternatives faster and the captive populations of despots have even more reason to demand an end to low-tax regimes and corrupt skimming. They don't have to like us, but they do deserve the motivations and rewards of a move toward democracy.