Why do women even exist?

If humans are no longer born... we are grown, then why do women even exist?

Women and allowing women to even be 'grown' (not born), would be 100% useless for the machines' purposes. Human beings are batteries, so it would be best, if every single body is as identical as possible, for maximum predictability and control. Heck, why even allow limbs to grow normally, instead of using 'selective breeding' to have a 'human race' that are pure torso. Wouldn't limbs just consume energy uselessly?

If human beings are grown, then vaginas are useless, breastmilk is useless, giving birth is useless, uteruses are useless, and eggs are useless.

Or are the machines at the mercy of collecting eggs from female humans so humans can 'be grown'? That sounds very limiting to me, surely the machines have learned to create synthetic eggs, so sperm is the only thing they need to grow human beings, right?

For some reason, none of these important details are explained in the movie, it's kept VERY vague, and they don't go into much detail into the really stupid explanation that would require a lot of backing up for it to be even considered viable. Human beings make lousy batteries, as everyone has pointed out, and I don't think the 'combined with a form of fusion' will make it any more plausible.

Regardless of the 'fusion' part, this whole 'human batteries' explanation defies logic SO hard, the machines would never have built things the way they're shown in the movie, and it raises way too many questions about death, 'virtual birth', reproduction, parents, fat people, limbs, and why are people allowed to have such diverse bodies, how can people that have never seen their real bodies have an accurate 'digital projection of their mental self' (It's said wrong in the movie, the movie version makes no sense)?

Why would they allow women and females in the physical side, when they serve no purpose for anything, and would make worse batteries anyway? There could still be women in the virtual world, because why would it matter what their physical body is like, if their mind is the only thing living in the Matrix?