What's the difference between him and other employers who make their potential and current employees pass drug tests? He isn't telling employees what they can eat at home. "Fanatical?" not in my opinion. Maybe just concerned about the number one threat to Americans -- obesity and the diseases it causes.
I wonder how people would react if the person in charge of the Health Dept was giving away free hotdogs, lollipops, and fruit roll ups, which might kill you faster than marijuana .
Since you are voicing your opinion, I find your above statement rather hypocritical. Also, Dr Newsom was trying to do just that -- let people live. The foods which he was ranting about were foods that contribute to the death of many Americans.