My dad smoked for 50 years until quitting in his 70's. Now, at age.80, he's still healthy as a horse. However, I wouldn't draw a conclusion from an anecdotal data point and say cigarettes aren't a health hazard.
>but smoking organically grown tobacco without additives and filters doesn't seem to do much harm from my experience.
Get an x-ray or ct scan of your lungs. Or get your VO2max tested. Quit for a month and try testing it again. I assure you, you'll see a difference just from your airways and nasal passages not being inflamed.