I'm a past smoker, and I smoked from about 15 till 37 years old. I understand what it does to you, but I also understand a bit about the figures...
In Canada especially, cancer is a skewed topic where numbers and causes are concerned. For instance, BPA is recognized in Canada as a Cancer causing substance where it's concerned with food storage and packaging, but you're encouraged to by Progresso products that come in BPA lined cans in order to support Breast Cancer (Campbells has removed it from their cans, but the Pink Ribbon campaign cans by Progresso are still BPA lined). It appears that the Canadian Cancer Association doesn't have the cahoneys to point out how wrong this is to put the majority at the risk of supporting a minority for fear of losing funding (and I'm not going to rant on that subject today).
If you take a step back and look at the situation logically, it's the same thing with smoking in houses. You have those in close quarters to smokers or the smokers themselves at risk. This is now the minority of the population, but the powers that be are concentrating on this, instead of questioning the air quality that affects the majority.
I don't condone smoking, but this is now a witch hunt on smokers, instead of letting smokers attrition take care of them whilst people turn their attention to bigger matters like air quality.
Now, some people might say "Ah, but think of the children!". Yes, let's turn to children for a second.
Here's a Ford F-150. Just take a look at it.
That is how low down in everyone's thoughts air quality really is. Ford designed their trucks to point the worst air at the sidewalk, at the height of kids faces in strollers. Now, either they didn't think about the design of their trucks and how they' re used in the community, or if they did and realized this mistake, they made a conscious decision that this is actually OK.