She can either be worshiped by a million nerds, or by ten dudes with a porn addiction, which would you choose.
You have a point, but these smoke fetisher motherfuckers aren't nearly that limited in number. I don't have the figures to prove diddly-squat, but I reckon upwards of 10% of the population, male and female alike, find the sight of a sexy woman smoking somewhat alluring or romantic if not outright sexy.
And really, why shouldn't they? It's totally phallic. Like Jolene Blalock (T'Pol in "Star Trek: Enterprise") said in "Maxim," she has an "oral fixation" with "cigarettes and straws."
But Hannah can do whatever and whore herself out to whatever gets the most hits -- can't blame her for that, I guess. She's ditzy as hell but at least smart enough to appeal to the masses, as you suggest.