Agenda science.
I know that I do not like second hand smoke. If someone smokes in a room in my house, I can smell it for the next day.
I also hate the smell on my clothes from second hand smoke.
I don’t like the smell in my car from second hand smoke.
Hotels are taking notice providing “never smoked in rooms” which I like better. I am glad there are still “smoked in rooms” too.
I don’t know if tobacco causes cancer or prevents it though. There is apparently one compound in tobacco that may show some anti cancer properties.