There are all kinds of privilege - white privilege, male privilege, straight privilege, cisgendered privilege, and in the Western world there's Christian privilege as well. There's also able-bodied privilege. I toss the last one in as afterthought because that's how it came to me and it serves to make a point: privilege is invisible and easy to forget, ignore, or dismiss. By its very nature, those that benefit from it tend not to notice those benefits. I've never had a physical disability, so problems disabled people face every day aren't problems for me: I never have to research buildings to see if I can actually get into them because I use a wheelchair, I don't have call the theater to schedule my movie to be shown with captions because I am deaf (and that assumes there is a single nearby theater that implements captions), I don't have to hope that a company website is audio-navigable because I am blind and can't interface with a mouse. Those privileges are at least translucent instead of transparent - they are visible once pointed out. They are just as forgettable to those who enjoy them. And so I, someone aware that privilege exists and who thinks and talks about it often, only recalled able-bodied privilege after deliberately wondering if I left out any disadvantaged groups.