Not at all, but every family has to exercise due diligence in determining what it can handle, and make as sure as humanly possible not to bite off more than they can chew.
The wrong addition to a family can literally destroy it.
So what exactly do you do with the children until they grow old enough to show you what kind of person they are?
And how do you explain school shooters or criminals in general that grew up in their biological family?
If you are anti-abortion, it seems to follow that you have to be pro-adoption.