Firstly there is no reasonable reason to be firing a gun vs driving. Secondly the act itself is illegal.If the guy took a gun, and fired blindly, he would be convicted. That is a very small object traveling at very high speed.
He chose to drive blind. That is a large object at high speed. Just because people are stupid and do not understand the gravity of driving a vehicle does not excuse it. Instead of "shit happens" it is time to admit we have too many shitty drivers. Every day I see people running reds and stop signs in Toronto. Zero enforcement. It is pathetic.
Once again, if you want to kill someone, do it with a car.