The inequality of physical bodies means the inequality of opportunity. So you can make a rule that women may now try to join the combat infantry, but they must pass the same physical test as men. Of course, virtually no women will pass this test, and if you were consistent, the few that do would soon be expelled for having sex with their comrades. The opportunity exists on paper, but not in physical reality. That's why, even when we gave women legal equality with men decades ago, it didn't achieve social or economic equality.