Then why did you have a kid? The consequences of an action are the same regardless of the circumstances in which it occurred. If you knew that you couldn't afford to prevent your child's death why did you have one at all? It isn't classist at all to say "don't live beyond your means." Is it acceptable for the father in the ghetto to beat his child to death, because he's too poor to afford a psychologist? Is it acceptable for a single parent to drive drunk with their child because they're too poor to afford a baby sitter or a cab fare when they want to drink? Eliezer said that he doesn't have children consciously so as not to expose them to the enormous risk and endemic suffering that life today means.

And to your last paragraph, there are better things to spend time, money and energy doing, especially given the absolute impossibility of convincing even 26% of the population to go for it.