The phrase "are turned on to" means to become interested in or excited about something. The opposite of this would be to become disinterested or disengaged from something. Other antonyms for this phrase could include words such as "turned off," "unimpressed," or "unenthused." When someone is turned off to something, they are no longer interested or engaged in it. They may have lost their excitement or enthusiasm for it, or they may simply not be interested in it at all. Whatever the reason, being turned off to something is the opposite of being turned on to it.