I don't think so. I think it's tunnel vision on your part. I think you're trying to dictate what is good and what is bad. I don't think it's either. The issue is that I'm not making an argument for all of humanity, I'm making an argument for myself. A billion people die, they die. It happens. I don't subscribe to your morality, or your definition of apathy or anti-alien idealism. You're setting yourself up on a moral high ground and barring circumstances for anyone to feel differently based on your own judgement. Who the hell are you to tell me what's good and what's bad anyway? Because I treat death with callousness? I really do. Death happens. That's what people do. They die. No use getting all worked up about it.
Let me ask: why should I care beyond an economic or practical matter? Why should I care on a moralistic or ethical manner? Does 'caring' make the aliens any better? Does 'caring' make the people of North Korea any less oppressed? If the aliens are dying and we can't help them, why the hell shouldn't we use the hand that fate has dealt us? It is an opportunity. Everything is. It's not that I particularly want to see them die or hold views against them. It's just that in light of the given circumstances, I'd decide to make the best of a bad situation. Simply put, that is, in my own opinion, at least it's not us. At least we get a whole galaxy of resources to ourselves now. Always look on the bright side of life chap.
Or have I pissed off your sense of self-righteousness?
I think the "and we can't help them" stipulation in your post is crucial, Massively. It's the difference between simply acknowledging a situation for what it is and "manufacturing" these "opportunities," even through inaction. Case in point: the Alliance discovers a civilization numbering in the hundreds of millions. Their planet is blessed with an abundance of precious metals/whatever/something worth wanting, but their space program is no more advanced than ours in the modern day. They have no colonies, and have only sent a few dozen of their people to the Citadel as part of First Contact proceedings. However, a dinosaur-killer asteroid is found to be on a collision course with this world, albeit almost a year from now - a natural, random event, not Balak 2.0. The people under the hammer lack the means to deflect the asteroid and save their species, but the Alliance could do so on a whim.
With your morality as you've described it, I still expect that you'd have the Alliance deflect the asteroid, if only because it'd be more economical to trade with them for the metals, harvested by them via their existing infrastructure, rather than stepping back, watching them die, then swooping in afterwards to claim it all for ourselves. If I'm mistaken, either in my judgment of your motives or course of action in the provided scenario, I apologize - I'd rather not be David, insisting you'd do what I'm guessing you'd do. That's just my best guess based on what I've gathered thus far.