It’s more about the entitlement. They feel entitled to children but can’t have them without going through another human being to make it so. As such, laws are made to give them control over said human beings.
It’s like all those proposed save all the kids on the internet laws. The kids are not what it’s really about. Sure, you can dig up a rare human or two who really does want it to be about that, even to the point of belief, but the kids are never what it’s about.
If an immigrant is paying taxes, then they should be the least of ICE’a concerns.
It is one piece of how we keep social security going. People who pay in and never collect.