Smokers literally tell their children
"You should never start smoking."
Then the question
"Why did you start smoking then?"
I even heard stories of smokers beating their children when they catch their children smoking.
And to make it even dumber, smokers often smoke in same room where their small children are, not only poisoning them but also increasing chances of addiction and health problems.
Whats even dumber is that children of smokers are more likely to be smokers themselves, but smokers still refuse to "quit smoking to decrease chances of their children smoking".
So smokers are bad.
But are they stupid?
The most common argument of smokers, when I point out that smoking is unhealthy, is them saying "There was this guy who smoked a lot and lived 100 years." and "I only smoke a little.".
The first claim is so stupid that it literally causes physical pain in my brain.
The second claim is usually a lie, because when smokers say they only smoke a little, they actually compare themselves to biggest smokers they know.
For example, if I smoke 40 smokes a day, but someone else smokes 80, then I "only smoke a little.".
If this proves anything, its that smoking literally kills some parts of your brain so in some cases you cannot even form an argument as the damage is that severe.