Restriction is not a ban
This law is necessary because scientific research has proved conclusively that the carcinogenic fumes from tobacco smoke can kill or at least cause a host of debilitating illnesses to those who inhale them.
There are similar laws governing the use of firearms, insecticides, mechanically-propelled vehicles and other possibly hazardous items. Note, there is no ‘ban’ on these products either. In view of this, it would be a very inconsiderate person who would disagree with the new legislation in regard to smoking.