These resources are for people to live their lives in comfort. I know a woman who doesn't turn her heating on in the winter because she can't afford to; there will be a lot more I don't know, and some of them are going to get very sick. Cheaper oil will help these people on the margins. Similar stories can be made for any commodity, these are literal building blocks of modern society.
Sure cheaper commodities aren't an infinite good, but the marginal utility of some creature that is so rare it is almost extinct isn't going to exist for anyone but the keenest nature goer. They are by definition rare. Cheaper commodities will probably be more good to more people than that.