They have already spent millions to make this a possibility. Our combat troops are basically pack mules. The know that women can't hump the load. They have robotic mules and other stuff that they are testing. The issue they are having is portable power. A real mule just need some grass and water. A robotic one requires a power source that we have not invented yet. All fantasy on their part.
I never had to wear full combat gear but I had to wear all the protective gear, flak vest, helmet, LBE and chem gear, and that sh!t is heavy. I weighed 50lbs extra without the chem gear.
Robots will eventually take up all combat roles. Human reactions are too slow/can’t take Gs/have families. We are looking at only the beginning edges of this evolution with telecommanded devices (like drones). Autonomous devices will follow before long, as soon as the software catches up. We don’t have a lot of choices - we will not get enough volunteers, we have become too casualty-averse, and we have to get this developed before our adversaries do.