100% it would mean they would be more loved by parents. Whenever someone is pregnant, she and the baby daddy always have a certain gender they are hoping to have it be and when they find out the sex it can lead to disappointment. By being able to prechoose the gender of your baby everyone can get what they want and be happy.
No, in my opinion pre-selecting the sex of children will not result in them being more loved by their parents. I believe that one does not truly realize their love for a child until they are born. Some parents who did not plan on a child can change and now can not imagine a life without a child.