Racing can also make you a crapton of money if you go pro...smoking just kills you eventually, ruins air for everyone around you and sucks all the time. You can't make a ton of money from smoking, but instead it always costs money..and if you get lung cancer you'll probably go broke from the medical bills tho you can go broke from racing-related medical bills, but at least there is a very real upside to racing everytime you're able to do it. Racing is fun, at the very least, but works toward a possible goal of going pro and doing it for a living...huge payoff potential.
Smoking in the wrong places can also get you into fights (if yer a dick about it and if you smoke around the wrong person) and land you in jail.
Can't really compare smoking to racing!