Yeah. I don't see them either. There are probably very well-organized people out there with a crack habit. The ones I see are the dead-eyed fuckups on the street spreading misery to themselves and their surroundings.
But it cuts both ways. There's a phrase "high-functioning alcoholic", meaning someone who still holds down a job, wears respectable clothes and all that. I grew up with a drunk: "high-functioning alcoholic" just means the worms are well concealed inside the can.