Here are things I understand about this topic:
Having a boy or multiple boys, and wanting a girl next to experience raising a daughter
Having multiple boys and 1 girl and wanting another girl so dd won't be the only girl
Having an older ds and a younger dd and wanting a dd (or reversed, older dd, younger ds, wanting another ds) because of the closeness in age, I do understand how people might think that this would help their child be closer to his/her sibling if the sibling was the same gender (Although, I don't really agree with this at all because of the multiple families I know that disprove the theory and just the general knowledge that there are no guarantees that your children will be like minded or close just because they are close in age and the same gender, but I do understand the thinking behind it and don't think these people are boy bashing or prefering girls for superficial reasons)
Here is what I don't understand:
Wanting a girl to give dd a sister and caring nothing about or totally overlooking the idea of giving ds a brother, as if it would be a tragedy if dd didn't have a sister, but ds could certainly and easily deal with not having a brother.
However, just because I don't understand something or agree with it, I can at least empathize with those who clearly desperately want something they are not going to get. We've all been there over one thing or another...
Does it make me sad that women seem to prefer girls over boys? Yes, it really does because I know the joy my boys bring to me, I know that regardless of gender, each child is a blessing and will have a personality all his or her own. I wish children of all genders and abilities could be celebrated for the positive rather than criticized for the negative. It makes me sad that children are forced into being someone or something they're not because their parents can't just accept them the way they are.
It all comes down to this in my opinion: You have to raise the child you are given, NOT the child you wanted. We are not managing an inconvenience, we are raising human beings!