People die of cancer and other diseases everyday, and you considered it selfish to want to live? What about the impact on loved ones like children or parents?
What about the quality of life? Being healthy is strongly tied to living longer.
ego driven as it values human life so much that it ignores how much damage it will do, not just to us, but to everything in general. We need to figure out a whole lot more before we can even consider extending our life expectancy like that.
The damage is from pollution, not necessarily resource consumption in and itself. Yes, if the air is bad, we're going to die more of lung cancer. The solution is to build a society that value clean air, a stable climate, and a life support system(biosphere) that isn't steadily being destroyed as a byproduct of our consumption.