Question for 6-7

In chapter 6 Kathy says, "I don't know how it was where you were, but at Hailsham the guardians were really strict about smoking. I'm sure they'd have preferred it if we never found out smoking even existed; but since this wasn't possible, they made sure to give us some sort of lecture each time any reference to cigarettes came along"(67). Why do you think the guardians are so against cigarettes? Do you think it is only because of health reasons, or are their other reasons?