Final answer:
Father turns off the radio in the middle of the broadcast to break free from their automated lifestyle and reconnect with his family.
Step-by-step explanation:
Father turns off the radio in the middle of the broadcast in the story because he is deeply disturbed by the dependency and obsession his family has developed towards their automated house, which controls nearly every aspect of their lives. He sees turning off the radio as a way to break free from the artificial and disconnected lifestyle they have been living, and to start embracing a more authentic and human existence. By shutting off the radio and other machines, he hopes to reestablish a sense of family connection and enjoyment of simple, personal activities.