It's not about ethics but being practical. I'm pretty sure that countries like Russia and China are laughing their asses off when they watch cringe worthy crap like that Senator pushing her ideological agenda rather than doing her job in making sure that the most qualified person is appointed as secretary of defense.
Personally, I think that if women are allowed to serve in infantry roles then female only units should be formed. It has been proven that men get far more demoralised when they witness female deaths. Hence it becomes more difficult to maintain unit cohesion. Unfortunately it may take a military embarrassment to kick everyone back to reality. It is said that political correctness has been allowed to breach the military but I suppose it was inevitable.
