"No child who found out he/she was set to be straight would be angry about that."

I would be terribly upset if I found out my parents had 'set me to straight', or even the other way around. It is not their decision to make. Just as I would be upset if they gave me shots to make sure I would be a blonde, or tall... Being given the ability to choose for our children doesn't mean we SHOULD. A child should be accepted for exactly what it is, not what it can be made to be.