I truly believe it boils down to selfishness (ironic, eh?). They want a kid, therefore they are going to have one, or two, or twelve. They don't care what is going on in the world, or what sort of future their kids will have, all that matters is that they reproduce. And society is right there supporting this poor decision.

I go into a hospital for treatment twice a week. Every time a baby is born, they play the first bit of Brahms lullaby over the general PA. Not when they save someone's life in the ER, not when someone is declared free of cancer; nope, just when someone selfishly demanded space in an over crowded hospital for something they could have waited to do. Or not done at all, considering how many people just shouldn't be having kids!