Why does the cigarette case say "Smoking is harmful to health"? Isn't this a contradiction?

Because cigarettes contain nicotine, which is harmful to human health, many countries have implemented smoking bans, but the effect is beyond their expectation. Smoking has not been banned, but has become more and more rampant. Later, after many countries agreed, the words "smoking is harmful to health" were written on the cigarette case. I hope everyone can stay away from the harm of cigarettes.