How about you got into a brawl and kicked the living ***** out of them and they died as a result?
Or how about you set fire to a building to cash in on the insurance without knowing there was someone in the building?
Or maybe you killed someone while driving a car over the limit or while using your mobile phone.
I see the second two as different to the first. In the first, you knew what you were doing would injure the person, and you should have been aware that it could lead to their death.
In the second two you had no intention to cause harm. The fact that you did cause harm would (should) haunt you for the rest of you life.
Then again, I’m in danger of entering into a heated debate with a Turner, and I know that’s never wise… ;-)