It doesn't prevent them from doing the job; however, the associated problems of not properly dealing with this issue simply mean that a female soldier is vulnerable to a host of maladies men are not from a simple problem of hygiene. This is not an insurmountable problem by any means but, again, the issue largely isn't about resolvability of various minor issues; it is if the measures that would be necessary to solve the problem are worth the effort.Bara_no_Hime said:As to 2... are you really going to claim that women can't be in combat because of their periods? I'm not sure whether to be amused by the comic immaturity or shocked that you actually think a period is going to stop a female soldier from doing her job.
For each of the problems you might list, there is a solution. The higher incidence rate of failure to meet standards means you'd simply need to start with more trainees to get the desired end result. Of course, this comes at a cost - those who fail still get paid for the attempt, money is still spent on the materiel for training, and many who fail will draw some amount of disability payment for the rest of their lives as a result. As such the obvious solution absolutely represents an increase in cost to field a single female soldier. I'm not going to speak to what the cost difference might be because, again, this is an issue that I've simply never seen a study on - it's far to incendiary an issue to actually take up with any seriousness.
The issue of hygiene is likewise solved by simply increasing the logistical effort devoted to a unit that includes women but, here again, you see a problem. Supplying an army in the field with the basic necessities of rations and ammunition is incredibly difficult especially when your supply lines are thousands of miles long. While the necessary supplies to greatly mitigate hygene related health issues (and, truth told, we aren't talking about much more than baby wipes and tampons) are comparatively minor it again represents a consideration you can overlook in a dire situation.
There are absolutely women in the world who could fight in the infantry to great effect. There are absolutely women who could even serve in various Special Operational roles. The problem is that recognizing they exist and actually making that happen are two wildly different things. There are very real issues with females serving in those roles in general but, more importantly, there are a host of social barriers that stand in the way as much as anything.
As I pointed out before the thing that really gets in the way are things like questions about the effects on unit cohesion and combat effectiveness when soldiers are sleeping together (a thing that absolutely will happen) and this long held distaste we in the west have with involving women directly in combat. That many can broadly recognize that women are just as capable of being shot at as men is a remarkably different and easier to make realization than accepting that it's okay to send them to be shot and maimed and killed as a key part of their job description.
That, more than anything else, is what keeps women out of direct combat roles today. Those jobs may well involve being shot at and even call upon them to defend themselves and their unit but such action is not expected. To put them into a direct combat role would be to say that we, as a society, are fine with sending women to die for a cause. That is a line few nations have been willing to cross.