In addition to the financial implications, that's why we're stopping at 2. We get kids, the kids get a sibling, and it's a little below replacement level.

because we artificially increased the amount of food that we produce by doping the very Earth with poison.

to be clear, this only really changes the amount of food produced from a specific harvest, GMO foods are what you are closest to here, but those have very few downsides.

The primary issue here is centralized farming, if we were to decentralize it more, it would be vastly more economical.