Smoking makes you stink and accidentally light assorted items on fire.
It litters.
It drops the value of your car and your home.
It costs money.
It crinkles your skin and stains your teeth, hands and mustache.
It makes you look like a dope standing outside in the cold.
Some of the secondary health consequences, such as a prematurely soft weenie, are underappreciated, in my experience, but I realize you want to leave those out.
Most of all, it limits your acquaintances to those willing to hang around smokers. In the business world and in life in general, this can have substantial consequences.
From a social perspective, it’s actually a terrific idea. Smokers are very productive and tend to croak before sucking their retirement benefits (your relatives excepted). This is a net cost savings to society. So by all means, have at it.