Why not?
Do you have specific reasons other than simple tradition?
Yeah, it's called respect for females. Very, very few of them have the body strength of men, and as has been reported, they don't do too well in combat (I'm sure you don't agree) and the male fellow soldiers spend too much time worrying about the woman's safety rather than killing the enemy.
I feel sorry for you if you feel that women deserve an equal chance to be captured, raped, molested, and killed.