A few days after my last post I had one of those moments where you slap yourself on the forehead with a big old Homer Simpson “Doh!” — I’d forgotten to take into account the gender and class issues inherent to my anti-ambition/anti-career screed. Staying home is a totally different issue if you haven’t had, or haven’t felt you’ve had, the opportunity to go out into the world, to become what you want to become, and to throw yourself whole-heartedly into the thrill of building a career. At the Montana Book Festival this summer, Kate Bolick and Sarah Hepola gave a terrific…