Let me use an analogy to see if I can show what I'm trying to say...
I'm driving a car with a trailer attached.
If someone puts a piece of furniture into the trailer that I don't want, I would take it out. I don't care about it, and if it rains and this furniture is ruined, I don't give a rats.
But if I put some furniture into the trailer that I do want, I drive it home, cover it on the journey so it is undamaged, get it home, sand it back, repair any broken pieces, paint it, restore it and make sure it is treated well, then this is proof that I do want it.
Now, your argument, if applied to this situation, would be, "Why are you bothering to paint that piece of furniture that you brought home, covered to protect it from the rain? After all, you were happy to let the other bit of furniture you didn't want get ruined, so why do you bother fixing up this piece that you do want?"
If you can't see the difference, there is no point in trying to have a rational discussion with you.
However, I suspect you will try to simply say that a child is not a piece of furniture, missing the point of what an analogy actually is.