[character happily points at a green cube] Green cubes are not dangerous for your health, they're just green cubes
[the character is suddenly drowned under a mass of green cubes falling from above]
[a researcher looks smugly at the previous panel] Seems a million green cubes falling on top of you is not healthy… This we have conclusively proven that green cubes are bad for your health
Side note, it's near impossible yo find any info whatsoever on what 1-5 cigarettes a week do to your health. I used to casually smoke roughly that amount and wanted to know what the risk was but I genuinely couldn't find even a single study.
You seems to be lucky with addiction, but it's so incredibly rare, research into that might be impossible without killing a bunch of people, making them addicted to nicotine. Anecdotally, all my friends who were casually smoking "only at parties" or no more than a sig a day, either stopped, or started smoking for real.
I have super debilitating ADHD, and my lack of tendency to form addictions is just about the only advantage, but I'll take it gladly.