About 7-8 years back the local men's league had an all-female team join the lowest division. Now, I was sandbagging at the time, so I played in that division (and another one much higher) for the winter. This women's team had won a national invitational tournament and was primarily college-age women at their peak (some even played for college teams). The average age on my lower-level team was about 35-40. There were 9-10 teams in the lower division, and we all played 25 or so games.
The women went 0-26 that year. And the next. Then they stopped playing...
So, let them attend Ranger School. They will fall out by your own admissions. It is imperative that the Military brass keep the standards. Now that may be more difficult than Ranger School. But that is a cultural/political problem.