Same physical standards upheld or not (they won't be), same capability to be a down-in-it grunt or not, adding females to male-dominated/oriented high-stress situations like, say, combat simply adds another, and very primal, stressor to the equation.
Males, of any species, are males (save for the 10% gay ones that liberals like to make comparisons to) and will be influenced, usually negatively, by having females in fight situations. I will call BS for anyone that says introducing females into flying squadrons, artillery BNs, etc, hasn't produced ccok fights, friction, and trouble related to the mixing of males and females. It is, not even human, animal behavior. Add in house-to-house, getting the bejeezus shot out of you on a ridgeline, etc, etc, etc, and it's gonna cause problems.
Ivan/Li Xu/Hajji, etc, are gonna have fun with this one.
I am not hating on the females who do the job now. This is not about you the individual. This is about biology.
Good luck, LT Snuffy, of 1st Platoon. You are gonna need it...