Reb Yid You have to know where the smokers hang out and avoid those places. I assume you have eyes that can see and a nose that can smell you have to avoid their hang outs. The wind cleans away the odor in seconds. You are not covered in the smoke, it’s just the odor that attaches to your clothing and you have a sensitivity to it.
Sparkly Both Speeding & Smoking MAY kill but while smoking will take years until he gets sick, speeding will kill you in a second. I never smoke and likewise never speed. Is the few seconds or minutes that you save worth your life or years of rehabilitation to get back to normal.
As to the studies that compare many people, just like you say those people that got into speeding accidents they were bad drivers but I am a good driver. You should know that if you are going 60 miles per hour which is not speeding you are going a mile a minute and you would not be able to stop in time to avoid an accident. Similarly, the smoker will claim these people have a weak immune system but they have a strong immune system. This is why some people will die of lung cancer in their 50s who have never smoked while other die in their 90s and smoked most of their life.