People's emotional states lead to vehicular accidents and fatalities every day. Let's face it, some people just shouldn't be driving in the the first place... If emotional variables were completely removed accidents would be lessened no doubt. But we also open up the potential for massive hacks, software not being compatible,.... There will never be a perfect system, but removing human emotion might now be a completely bad thing.
In aviation from the time the plane is 200 feet in the air the autopilot is engaged and usually stay on until the last seconds before landing. Yes pilots can make course adjustments according to weather, but the plane is control of the flying making it safer. Most planes now can takeoff and land autonomously, but in the US it's mandated a pilot to the takeoff and landing...