A propos of nothing*: Once upon a time, people could smoke in pubs and cafes. This was harmful to them, to others, and generally made the environment pretty unpleasant. But it was the status quo.
Other people smoked regardless of the impact their choice had on you. They smoked around your children, who were breathing in toxic air. The public health implications were huge.
Campaigns were launched to ask people to change their behaviour, to little effect. The then-CMO said “voluntary agreements were not reducing the health risks from passive smoking quickly enough”. Something drastic had to be done.