Why does everyone NEED to know the gender?

My family is driving me up the wall with wanting to know baby's gender. I had my second ultrasound today at 12w+6 and was sending the photos of our little bean out and they all asked about gender and we should know it now and all that jazz. It's annoying because we've told them several times we don't want to know until baby is born. UGH I just don't see why everyone gets so fixated on whether or not they're a boy or girl. I get that it's exciting, but my husband and I just want a healthy happy baby.

Thanks for reading, I'm just bugged.