Things like security and other technical issues can all be improved anyway, I think the real problem is cost. It's a lot cheaper to outfit a soldier with some body armor, a gun, whatever else.
Minsc thinks an average soldier can be very expensive.
Examples: Training-food-housing-wages-gear-so forth.
If done right, it's possible that robots could be cheaper to mass produce than a human.
Here is a scary thought: What if terrorists start using this technology? Send in a robot to do their work, and makes for an easy escape.
Or what about mastermind criminals? Imagine if a robot was programmed specifically for bank robberies. It could be designed to look like a baby stroller.
This technology could save lives, but also take them too.