Females in the proper front-line roles (ie, pilots, truck drivers, tank drivers, artillery crews, etc) did the USSR a lot of good during WWII (many of the Soviet Union’s top snipers were females), so perhaps there is some merit to this.
However, that is being said with the full knowledge of political correctness nowadays, as well as the full knowledge that some people view equality as a means to an end, not an end in and of itself.
Females, in proper roles, are performing very valuable service in combat in the U.S. Army and the USMC. Those roles include conducting patrols where their expertise and their sex are very valuable when dealing with local female villagers. But, those are not infantry roles, and we still have cases where females are expected to carry out tasks beyond their physical abilities. Truck drivers don’t just drive the trucks, they also must change the tires, load the trucks, winch it out of the mud, etc. When they can’t do it, a male soldier must be diverted from his job to pick up the slack.