its complicated. Everybody doesn’t form antibodies. Presumably if an Rh mom got pregnant in modern day times they would get Rhogam if they had prenatal care. But yes, children and individuals with child bearing potential are the ones we try to avoid exposing them to making a potential antibody. But at the end of the day if the blood is going to save you that’s more important than an antibody you might form. It won’t matter if you’re dead.