Trouble with Impositions Nonexistence Nonexistence [path 1]
Existence [path 2]
Path 1: No imposition; there's no one to impose on.
Path 2: To be consistent, no imposition; there was no one to impose on, just like in path 1.
However path 2 leads to the creation of a human, call her X. Did this human, X, choose to be born? Obviously, no s/he didn't because she didn't exist to make that choice.
However now X analyzes her situation carefully - she could come to the conclusion that she's happy and is happy with life or she could be down in the dumps 24×7 and this thought crosses her mind: I wish I had never been born! Therein lies the rub.
In my humble opinion, to aid parents in making sound decisions, one must assume persons exist antepartum: Given how things are - the state of the world, finances, etc. - would anyone want to be born (to us)? Thinkin' for someone else is the tricky part; how do you know your child isn't going to be a masochist (pain is fun)?
Summary:
Firstly, we realized that we need to assume people exist prior to their births; otherwise, we wouldn't be addressing the documented sentiment "I wish I had never been born!" which is nothing more than the claim that had I existed prenatally, I would've chosen nonexistence over life.
Secondly, there's no satisfactory way of predicting how your child will respond, positively/negatively, to the world.
Argument from reversal of position
If you're born and you don't like life, you can always kill yourself (not easy, but doable).
If you're never born, that's it; you don't have the choice to be born - that ship has alreasy sailed/left the harbor as it were.
Ergo, natalism is preferable over antinatalism given the uncertainties that inhere to the problem of suffering (in life)?