People who love coffee brew it themselves. They don't need to endure long lines and wait for some poorly treated minimum-wage employees to burn it for them.
I suspect coffee preferences, whether someone makes it for them or not, might be down to whether their place of work is conducive for even making coffee. Perhaps there are socioeconomic lines as well that divide people. Do most people feel the need to have their coffee made for them at a fast-food establishment?