Does it still weed out males with FFS?
An important point is that the face recognition it's just an automation - it's not the rule. You're not "permitted if you pass".
The rule is no males. If any male did slip through the automation (or manual review), he's out if he's discovered. So there's absolutely no way a male can cause trouble, except by quietly spying. It may not be 100% secure, but the rules keep it a viable female space.