Dude, chillax. Yeah, we know scientific studies are fabricated - we've all heard about vaccines and autism, homosexuality being a disease, etc. We know that. And we know that automobiles produce toxins. So do cows - more so than said automobiles. And yet we're not jumping on top of non-vegetarians or people who don't carpool.
Why?
Because while those things are also choices, they're necessary ones. You have to get around. You have to eat. Sure, you could bike everywhere and be an eco-sensitive vegetarian, but let's face it - for some people, those aren't really options.
Smoking, however, is an unnecessary choice. What do you
have to do that smoking permits? What basic need is met by lighting up a cigarette (aside from relief from withdrawal symptoms)? All that you're doing when you light up a cigarette, puff it for ten minutes, and flick the butt onto the ground is polluting the air for those around you, damaging your body, feeding your addiction, and littering.
Not attacking anyone here. Just clarifying points.
TL;DR: We know studies can be fabricated and that there are other sources of environmental toxins than just cigarettes. The difference is that there have been so
many studies on the effects of cigarettes and that the other sources are societal and biological necessities.
So CHILL, dude.