Basically I've heard that line before ("how can you X when Y is going on in the world??") and it's basically just a way to feel morally superior and boost your ego, it doesn't actually achieve a useful end. You can use this line on basically anything people are doing that can be considered art, and unless you're suggesting that all artful pursuits be indefinitely suspended until the world is free of problems, it's an inconsistent, nonsensical argument.
tl;dr: I like the project, I dislike the attitude.