Risks of the AI going amok set aside there’s something appealing in not risking human lifes during conflicts. Karmically or economically wise. Also you remove the limitations of human bodies -suddenly your airframe can give 100% of its capabilities without turning the pilot in a milkshake.
Removing humans from your side of the war lowers the cost of going to war and allows for even more centralized power. It’s a lot easier to do morally bankrupt acts if you don’t need to convinced a group of human soldiers to do it. Clearly you can anyway a lot of the time, but going for the robots is a lot cheaper/less risky.
It’s pretty obvious why powerful people would want this and why it would be terrible for the rest of us even without worrying about a hypothetical sky net future.
It's a lot easier to murder with robots, but they're going to need new models if they want to replace all the raping, pillaging, bureaucratic corruption, oppression, etc...
It only sounds problematic to someone who cares about the lives of ordinary people. But that's not the sort of person who dedicates their whole life to increasing their own wealth and power by any means necessary. Those are the people that get to make the decisions.