I'm curious if you ever attended Infantry OSUT and then experienced the absolute shock of going from a training environment to an active Infantry line Company.
Everything gets harder and faster immediately.
To graduate OSUT you carry a ~20 lb. ruck and an ~8 lb. M16/M4 a couple of maybe 12 miles and then essentially camp out in pup tents in the Georgia woods for a weekend.
I did that and successfully graduated and a few weeks later found myself in the field with a line Company in Germany in January.
A few weeks later I spent a week in the field carrying a ~50 lb. ruck and a ~20 lb. M249 up and down the German hills in about 2 1/2 feet of snow. Rather than building a nice neat little camp out of shelter half tents we used picks and shovels to chip flimsy fighting positions out of the frozen ground and then spent the night laying in the bottom of a frozen hole trying, and failing miserably, to get a few hours sleep before we picked up and started walking up and down hills again.
I wasn't anything special when I was in the Army, not a Ranger or Delta Force or anything like that, just your average run-of-the-mill Infantryman, I didn't even serve in what might be considered a "prestigious" Division.
And I can tell you that "these advanced boot camps and training schools" you're talking about do not, in any way, prepare you at anything more than the most basic level for what you'll encounter in the real Infantry.
And also understand that I served in the peacetime Army in Germany.
There was a time not so long ago that guys were going from a training environment, to a couple couple months in the type of garrison environment I was discussing above, to a 15 month deployment in the mountains of Afghanistan where even the stuff I was doing in Germany would have been considered a walk in the park.
Please don't confuse successful completion of Basic and Advanced Individual Training with an ability to perform at an acceptable, to say nothing of a fully-contributing, level in an Infantry line Company.
I have met very, very few women in my life, either D1 collegiate athletes, women at my Crossfit gym, or in any other capacity, would would have been able to stand up to the daily grind of a couple of weeks in the field as an Infantryman.
It isn't something that being able to squat 300 lbs. in a sterile gym environment, or even through hike the Appalachian Trail at a leisurely backpacker's pace can really be compared to.
It's a cold, hard, dirty, hungry, wet, miserable grind that breaks you down day, after day, after day.
20 years later, as a 40 year old man, I've got arthritis in my knees, a chronically painful back, and am losing my hearing more and more each year to the point where I'll soon need hearing aids. I still suffer hypersensitivity to the cold because a couple of those nights in Germany I had frost forming inside my boots.
Understand, I believe that there are a small, small number of women who could probably do it, but I think that finding women who are capable of serving as basic Infantrymen is probably comparable to finding men who are capable of serving as Navy SEALs.
If you start with 100 men in an Infantry OSUT class, and I mean just run-of-the-mill, average recruits, you'll probably lose maybe 10% of them in training and then another 10% after training once they get to their line Company, and that last 10% will become the HMMWV and 5 Ton truck drivers, the orderly room clerks, or get sent to Headquarters Company to serve in some comparable REMFish role.
If you start with 100 un-of-the-mill, average female recruits I doubt you'd get even 10% through basic training and of those you'd only get 10% more more capable of serving effectively in any Infantry Company.
I don't know that it's really cost effective to train 100 women when there's a good chance that at the end of the day only one, or two, or five of them are going to show any return on that investment.
I have no problem with women being allowed to serve in Armor or Artillery units because, lets face it, that's women's work anyhow.
But I don't really see any place for women in the infantry even though there are almost certainly some of them would could do it.
