This, and ease of transition. I imagine if you're buying a robot for a factory/complex/rig/jobsite, you would want one that can access anywhere a human can. You can't just rebuild a factory for a couple robots
Does the robot need to eat its robot lunch in the breakroom and share some robot memes w/ its robot bros? We already have robotics in factories, when they are more efficient than humans the factories are retrofitted or rebuilt around the new machines.