Annoyed by people's "gender disappointment"

I don't care if it's a "real thing". So is pregnancy with a 50/50 shot at male or female. People act like they're so surprised and SELFISH when they don't get what they want. Why didn't you adopt a baby of the gender you wanted instead of disliking your own flesh and blood due to their genitals? Get over yourselves. This is a baby; a human life that you're complaining about because you were too uneducated to realize simple science. 
Who are YOU to determine if my opinion is valid or not? Exactly. No sugar coating here. 
How many people does it take to point out the obvious that this was posted anonymously? There's an anonymous option for a reason; acting like I did something wrong like disliking my baby's gender or something lol.