They don't. Their actions are of active resistance. It used to be passive. They don't understand or care about their own halo and slow adoption rate that IT usually endures. They are going to code some plug-ins for other companies and not worry about it. They really seem to want to be the toy's at work. So much effort in getting past that hurdle just to go right back. Their secrecy garners no respect at work.
Its very difficult to get large IT departments interested in Apple, given that they won't show anyone what their hardware/model roadmap is like so that we can plan budgets and refreshes around it.
Not to mention that compared to programs like Dell's Warranty Parts Direct, Apple just falls flat on its face.