You may be able to call 911 with no minutes, but you can't call your doctor to make an appointment, ask about your meds, or ask about your kids symptoms (just go to the emergency room to find out). You can't receive a call from a potential employer or employment agency (you won't be considered for a job if you don't have a phone anyway). You can't call a taxi to take you to an interview. Any government agency providing assistance can't call you (nor can you call them, even to cancel assistance, lol).
Argue for or against the program, but the benefits of having phone service and the detriments of not having it far exceed 911 service.
And those that think that they "should just get a job", need to remember that phone service is almost a prerequisite for getting one.