SAS does not allow women to join because, in real life, women lack the strength and stamina to be special forces. Men are, biologically speaking, capable of much higher levels of physical achievement.<br/><br/>In a superhero world where Super Strength is a thing, that is irrelevant. In this setting, where magic, super-tech, ancient gods, aliens, demons, and everything else is wandering around, there is no reason for special forces units to not take female members with low-tier super powers. Super powers do not care about biology. If they did, they would not really be all that super.