I disagree. I think resolve and meanness have little to do with sex, and depend on the individual. I also don't think meanness has a lot to do with soldiering.
A woman can machine gun the enemy,
Even after carrying the machine gun for a few kilometers and digging a spot for it? Kill an enemy who sneaks up on her position in hand-to-hand combat?
she can fly a plane,
And evade capture if she is shot down?
she can drive a tank,
Can she change the track on that tank? Manually traverse the turret? Load the tank with 10, 20, 30 or more 120mm shells? Pull out 180 lb unconscious gunner?
so even though I don't approve of women fighting on the front lines, I know that we can do the job.
There's a lot more to some of those jobs than you might think.