Keep in mind that as time progresses, more of our military actions are against unconventional enemies, including fighting guerillas or terrorists, and technological advances tend to favor quality over quantity. Also, I would hope, we can avoid pointless military conflict in the future as we've mostly done under Trump, but not so much under his predecessors.
I'm thinking and hoping that we won't need so many soldiers to throw into the meat grinder that we need women in the military. Though, if we really did need more soldiers, maybe it would be better to lower male physical standards instead of letting in females. It seems more reasonable, for example, to reduce the push ups required from 40 to 30 for men than to let women in who can only do 17 pushups.