Aside from the simple fact that .gov should stay out of a woman's vagina, the bottom line is this:
We're eradicating all the future tax cows.

No doubt a reduced human population is better for the planet however, it's not without a downside. Put what ever scripture you're into aside for a moment and read up on the future intersection of economics & demographics. You'll see the real justification for increasing both fertility AND immigration in the U.S..  

The MSM is way too busy creating civic and racial division in the populace to frame abortion in any other context.

Here's a look into the future - legal abortion or no:  
https://youtu.be/L8XQjfG2wYc