No child is immoral. To attempt to explain such a thing to a child would be nothing short of cruelty.
It is so easy to say that IVF, etc is “immoral”. Almost everyone that says such things is a person that has never had difficulty in conceiving a child, or is someone that will never have a child (a man, who also has no wife, no real knowledge of marriage, etc.).
I firmly believe that God gives us the ability to develop such technologies for a reason. I can not, and will not accept the idea that their use is automatically immoral. Can the use of such technologies be immoral? Of course, anything can be utilized for wrong purposes.
Of course I also have a wife that had 5 miscarriages, ended up hospitalized for severe depression after it was determined that she would never be able to carry a child to term. I only wish that there had been some alternative that could have given us a live child. We were also denied adoption of an undamaged child, or of a very young child, because my wife is a paraplegic. We were offered children that were severely emotionally disturbed, such as one 7 year old girl that had set fire to her last 3 foster homes. That was the youngest child that we were ever offered.
I frankly do not care what some man, who has never had a child or been married, has to say about this subject. That includes Pope John Paul II, who I greatly admire for most of his teachings.