You are going to have to sit my middle child down and explain that to him when he's 18.
He's the result of in-vitro using a donor egg.
Explain to me how bringing life into the world lessens the value of it.
There is one issue here that is legitimate for discussion: what happens to the other frozen embryos.
There is another not addressed: The morons that implant 6 embryos, have five take, and then 'selectively reduce' to 2 embryos.
The ends do not justify the means, but in-vitro fertilization is as much an act of love as intercourse, as long as the children are sought after in some fashion other than handbag accessories.
It's the means that lessen the value of it, not the end result (the child). Nobody is blaming the children that come about for the perilousness posed by in-vitro. When I said 'lessen the value' I meant that human life will be devalued in the same way you see it happening today: let's choose our baby's sex; let's take DNA tests of the fetus and abort it if it is not 'perfect'; let's whip up 10 embryos in a lab and, if one takes, let's flush the rest or harvest their DNA. In-vitro, like it or not, means that human beings are no longer ends in themselves - they are means to "parenthood", and procreation is taken out of the sacrament and into the lab.
You might say "In-vitro doesn't lead to that - bad decisions do." Well, that's true, but so does sex outside of marriage. And to the Catholic Church and its understanding of natural law, that's what in-vitro is. And that's where all its abuses come from - good intentions wrapped up in commodifying technology run by people who don't value life as an end in itself and sold to people who think they know themselves better than God does.
I don't mean to come down hard but that's my understanding of why the Church thinks in-vitro is wrong. For me, it's the pandora's box that's most obviously troubling - science's unfailing pursuit to do whatever it can if it can. They will do whatever they can with human DNA, too, and they will take reproduction outside of the sacramental confines of marriage to do it, too, it goes without saying.
I evil (the devil) can turn good intentions into harmful results and God can turn bad intentions into good things. We'll see what He makes of this.