FIFY
In all honesty, just like you I wish someday if I have a daughter for her to have all the opportunities she can achieve, I think any parent wants that. However, we have to get over the bullshit fairness idea and come back down to reality, I want to play linebacker in the NFL, well with my physical stature that ain't happening, and if it does it will be to the detriment of the team. Same goes for combat if my daughter can't hump the distance with the packs, pull her fellow soldiers to safety when they go down, nevermind pick him up and carry him to an EVAC site, than I will look at my daughter and say sorry not going to happen because what you want puts lives in danger.
And that's just one of the many aspects, in my mind no case can be made that women will not decrease the effectiveness of those combat squads, and any decrease is unacceptable because it is absolutely unnecessary.