You want a healthy baby. You don’t even care (much) about its gender as long as it’s healthy.
With IVF, your doctor has the ability to pick the strongest and possibly healthiest sperm. So if they can accomplish that, why can’t they choose the best looking sperm while their down there too? It would be nice to have a baby that didn’t inherit your husband’s larger body type, his adult or receding hair line. It would be great if the baby didn’t have Uncle Joey’s larger than normal ears or your father-in-laws extending forehead. And no child would wish for your mother-in-laws round behind, her unattractive man like hands and her noticeable . All you really want is a healthy baby (who also happens to be very good looking, higher than average IQ and will make a lot of money later in life).